Unity unable to convert dex classes

hi when building my game i get this error:

CommandInvokationFailure: Unable to convert classes into dex format. C:\Program Files (x86)\Java\jdk1.8.0_144\bin\java.exe -Xmx1024M -Dcom.android.sdkmanager.toolsdir="C:/Users/paulk/AppData/Local/Android/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity 2017.2.0b11\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -

 stderr[
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/ErrorDialogFragment;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/GooglePlayServicesUtil;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/SignInButton;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/SupportErrorDialogFragment;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/api/Api;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/api/Api$ApiOptions;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/api/Api$ApiOptions$HasOptions;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/api/Api$ApiOptions$NoOptions;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/common/api/Api$ApiOptions$NotRequiredOptions;
 
 UNEXPECTED TOP-LEVEL EXCEPTION:
 java.lang.RuntimeException: Translation has been interrupted
     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:613)
     at com.android.dx.command.dexer.Main.runMonoDex(Main.java:311)
     at com.android.dx.command.dexer.Main.run(Main.java:277)
     at com.android.dx.command.dexer.Main.main(Main.java:245)
     at com.android.dx.command.Main.main(Main.java:106)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:498)
     at SDKMain.main(SDKMain.java:130)
 Caused by: java.lang.InterruptedException: Too many errors
     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:605)
     ... 9 more
 ]
 stdout[
 ignored resource C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-app-unity-4.0.3\libs\.\armeabi-v7a\libApp.so
 processing archive C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-app-unity-4.0.3\libs\.\classes.jar...
 ignored resource C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-app-unity-4.0.3\libs\.\x86\libApp.so
 processing archive C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-auth-11.0.4\libs\.\classes.jar...
 ignored resource META-INF/
 ignored resource META-INF/MANIFEST.MF
 ignored resource com/
 ignored resource com/google/
 ignored resource com/google/android/
 ignored resource com/google/android/gms/
 ignored resource com/google/android/gms/internal/
 processing com/google/android/gms/internal/ip.class...
 processing com/google/android/gms/internal/iq.class...
 processing com/google/android/gms/internal/ir.class...
 processing com/google/android/gms/internal/is.class...
 processing com/google/android/gms/internal/it.class...
 processing com/google/android/gms/internal/iu.class...
 processing com/google/android/gms/internal/iv.class...
 processing com/google/android/gms/internal/iw.class...
 processing com/google/android/gms/internal/ix.class...
 processing com/google/android/gms/internal/iy.class...
 processing com/google/android/gms/internal/iz.class...
 processing com/google/android/gms/internal/ja.class...
 processing com/google/android/gms/internal/jb.class...
 processing com/google/android/gms/internal/jc.class...
 processing com/google/android/gms/internal/jd.class...
 processing com/google/android/gms/internal/je.class...
 processing com/google/android/gms/internal/jf.class...
 processing com/google/android/gms/internal/jg.class...
 processing com/google/android/gms/internal/jh.class...
 processing com/google/android/gms/internal/ji.class...
 processing com/google/android/gms/internal/jj.class...
 processing com/google/android/gms/internal/jk.class...
 processing com/google/android/gms/internal/jl.class...
 processing com/google/android/gms/internal/jm.class...
 processing com/google/android/gms/internal/jn.class...
 processing com/google/android/gms/internal/jo.class...
 processing com/google/android/gms/internal/jp.class...
 processing com/google/android/gms/internal/jq.class...
 processing com/google/android/gms/internal/jr.class...
 processing com/google/android/gms/internal/js.class...
 processing com/google/android/gms/internal/jt.class...
 processing com/google/android/gms/internal/ju.class...
 processing com/google/android/gms/internal/jv.class...
 processing com/google/android/gms/internal/jw.class...
 processing com/google/android/gms/internal/jx.class...
 processing com/google/android/gms/internal/jy.class...
 processing com/google/android/gms/internal/jz.class...
 processing com/google/android/gms/internal/ka.class...
 processing com/google/android/gms/internal/kb.class...
 processing com/google/android/gms/internal/kc.class...
 processing com/google/android/gms/internal/kd.class...
 processing com/google/android/gms/internal/ke.class...
 processing com/google/android/gms/internal/kf.class...
 processing com/google/android/gms/internal/kg.class...
 processing com/google/android/gms/internal/kh.class...
 processing com/google/android/gms/internal/ki.class...
 processing com/google/android/gms/internal/kj.class...
 processing com/google/android/gms/internal/kj$zza.class...
 processing com/google/android/gms/internal/kk.class...
 processing com/google/android/gms/internal/kl.class...
 processing com/google/android/gms/internal/km.class...
 processing com/google/android/gms/internal/kn.class...
 processing com/google/android/gms/internal/ko.class...
 processing com/google/android/gms/internal/kp.class...
 processing com/google/android/gms/internal/kq.class...
 processing com/google/android/gms/internal/kr.class...
 processing com/google/android/gms/internal/ks.class...
 processing com/google/android/gms/internal/kt.class...
 processing com/google/android/gms/internal/ku.class...
 processing com/google/android/gms/internal/kv.class...
 processing com/google/android/gms/internal/kw.class...
 processing com/google/android/gms/internal/kx.class...
 processing com/google/android/gms/internal/ky.class...
 processing com/google/android/gms/internal/kz.class...
 processing com/google/android/gms/internal/la.class...
 processing com/google/android/gms/internal/lb.class...
 processing com/google/android/gms/internal/lc.class...
 processing com/google/android/gms/internal/ld.class...
 processing com/google/android/gms/internal/le.class...
 processing com/google/android/gms/internal/lf.class...
 processing com/google/android/gms/internal/lg.class...
 processing com/google/android/gms/internal/lh.class...
 processing com/google/android/gms/internal/li.class...
 processing com/google/android/gms/internal/lj.class...
 processing com/google/android/gms/internal/lk.class...
 processing com/google/android/gms/internal/ll.class...
 processing com/google/android/gms/internal/lm.class...
 processing com/google/android/gms/internal/ln.class...
 processing com/google/android/gms/internal/lo.class...
 processing com/google/android/gms/internal/lp.class...
 processing com/google/android/gms/internal/lq.class...
 processing com/google/android/gms/internal/lr.class...
 processing com/google/android/gms/internal/ls.class...
 processing com/google/android/gms/internal/lt.class...
 processing com/google/android/gms/internal/lu.class...
 processing com/google/android/gms/internal/lv.class...
 processing com/google/android/gms/internal/lw.class...
 processing com/google/android/gms/internal/lx.class...
 processing com/google/android/gms/internal/ly.class...
 processing com/google/android/gms/internal/lz.class...
 processing com/google/android/gms/internal/ma.class...
 ignored resource com/google/firebase/
 ignored resource com/google/firebase/auth/
 processing com/google/firebase/auth/ActionCodeResult.class...
 processing com/google/firebase/auth/ActionCodeResult$ActionDataKey.class...
 processing com/google/firebase/auth/ActionCodeResult$Operation.class...
 processing com/google/firebase/auth/AdditionalUserInfo.class...
 processing com/google/firebase/auth/AuthCredential.class...
 processing com/google/firebase/auth/AuthResult.class...
 processing com/google/firebase/auth/EmailAuthCredential.class...
 processing com/google/firebase/auth/EmailAuthProvider.class...
 processing com/google/firebase/auth/FacebookAuthCredential.class...
 processing com/google/firebase/auth/FacebookAuthProvider.class...
 processing com/google/firebase/auth/FirebaseAuth.class...
 processing com/google/firebase/auth/FirebaseAuth$AuthStateListener.class...
 processing com/google/firebase/auth/FirebaseAuth$IdTokenListener.class...
 processing com/google/firebase/auth/FirebaseAuth$zza.class...
 processing com/google/firebase/auth/FirebaseAuth$zzb.class...
 processing com/google/firebase/auth/FirebaseAuthActionCodeException.class...
 processing com/google/firebase/auth/FirebaseAuthEmailException.class...
 processing com/google/firebase/auth/FirebaseAuthInvalidCredentialsException.class...
 processing com/google/firebase/auth/FirebaseAuthInvalidUserException.class...
 processing com/google/firebase/auth/FirebaseAuthProvider.class...
 processing com/google/firebase/auth/FirebaseAuthRecentLoginRequiredException.class...
 processing com/google/firebase/auth/FirebaseAuthUserCollisionException.class...
 processing com/google/firebase/auth/FirebaseAuthWeakPasswordException.class...
 processing com/google/firebase/auth/FirebaseUser.class...
 processing com/google/firebase/auth/GithubAuthCredential.class...
 processing com/google/firebase/auth/GithubAuthProvider.class...
 processing com/google/firebase/auth/GoogleAuthCredential.class...
 processing com/google/firebase/auth/GoogleAuthProvider.class...
 processing com/google/firebase/auth/OAuthProvider.class...
 processing com/google/firebase/auth/PhoneAuthCredential.class...
 processing com/google/firebase/auth/PhoneAuthProvider.class...
 processing com/google/firebase/auth/PhoneAuthProvider$ForceResendingToken.class...
 processing com/google/firebase/auth/PhoneAuthProvider$OnVerificationStateChangedCallbacks.class...
 processing com/google/firebase/auth/ProviderQueryResult.class...
 processing com/google/firebase/auth/TwitterAuthCredential.class...
 processing com/google/firebase/auth/TwitterAuthProvider.class...
 processing com/google/firebase/auth/UserInfo.class...
 processing com/google/firebase/auth/UserProfileChangeRequest.class...
 processing com/google/firebase/auth/UserProfileChangeRequest$Builder.class...
 processing com/google/firebase/auth/zza.class...
 processing com/google/firebase/auth/zzb.class...
 processing com/google/firebase/auth/zzc.class...
 processing com/google/firebase/auth/zzd.class...
 processing com/google/firebase/auth/zze.class...
 processing com/google/firebase/auth/zzf.class...
 processing com/google/firebase/auth/zzg.class...
 processing com/google/firebase/auth/zzh.class...
 processing com/google/firebase/auth/zzi.class...
 processing com/google/firebase/auth/zzj.class...
 processing com/google/firebase/auth/zzk.class...
 processing com/google/firebase/auth/zzl.class...
 processing com/google/firebase/auth/zzm.class...
 processing com/google/firebase/auth/zzn.class...
 processing com/google/firebase/auth/zzo.class...
 processing com/google/firebase/auth/zzp.class...
 processing com/google/firebase/auth/zzq.class...
 ignored resource C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-auth-unity-4.0.3\libs\.\armeabi-v7a\libAuth.so
 processing archive C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-auth-unity-4.0.3\libs\.\classes.jar...
 ignored resource C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-auth-unity-4.0.3\libs\.\x86\libAuth.so
 processing archive C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-common-11.0.4\libs\.\classes.jar...
 ignored resource META-INF/
 ignored resource META-INF/MANIFEST.MF
 ignored resource com/
 ignored resource com/google/
 ignored resource com/google/android/
 ignored resource com/google/android/gms/
 ignored resource com/google/android/gms/internal/
 processing com/google/android/gms/internal/aab.class...
 processing com/google/android/gms/internal/aac.class...
 processing com/google/android/gms/internal/aad.class...
 processing com/google/android/gms/internal/aae.class...
 processing com/google/android/gms/internal/aaf.class...
 ignored resource com/google/firebase/
 processing com/google/firebase/FirebaseApp.class...
 processing com/google/firebase/FirebaseApp$zza.class...
 processing com/google/firebase/FirebaseApp$zzb.class...
 processing com/google/firebase/FirebaseApp$zzc.class...
 processing com/google/firebase/FirebaseApp$zzd.class...
 processing com/google/firebase/FirebaseNetworkException.class...
 processing com/google/firebase/FirebaseOptions.class...
 processing com/google/firebase/FirebaseOptions$Builder.class...
 processing com/google/firebase/FirebaseTooManyRequestsException.class...
 ignored resource com/google/firebase/auth/
 processing com/google/firebase/auth/FirebaseAuthException.class...
 processing com/google/firebase/auth/GetTokenResult.class...
 ignored resource com/google/firebase/provider/
 processing com/google/firebase/provider/FirebaseInitProvider.class...
 processing com/google/firebase/zza.class...
 processing com/google/firebase/zzc.class...
 processing archive C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\firebase-core-11.0.4\libs\.\classes.jar...
 ignored resource META-INF/
 ignored resource META-INF/MANIFEST.MF
 processing archive C:\Users\paulk\Desktop\DexOS-login\Unity\Dexter\Temp\StagingArea\android-libraries\play-services-base-11.0.4\libs\.\classes.jar...
 ignored resource META-INF/
 ignored resource META-INF/MANIFEST.MF
 ignored resource com/
 ignored resource com/google/
 ignored resource com/google/android/
 ignored resource com/google/android/gms/
 ignored resource com/google/android/gms/auth/
 ignored resource com/google/android/gms/auth/api/
 ignored resource com/google/android/gms/auth/api/signin/
 processing com/google/android/gms/auth/api/signin/GoogleSignInAccount.class...
 processing com/google/android/gms/auth/api/signin/GoogleSignInOptions.class...
 processing com/google/android/gms/auth/api/signin/GoogleSignInOptions$Builder.class...
 processing com/google/android/gms/auth/api/signin/GoogleSignInOptionsExtension.class...
 ignored resource com/google/android/gms/auth/api/signin/internal/
 processing com/google/android/gms/auth/api/signin/internal/zzm.class...
 processing com/google/android/gms/auth/api/signin/internal/zzn.class...
 processing com/google/android/gms/auth/api/signin/internal/zzo.class...
 processing com/google/android/gms/auth/api/signin/internal/zzy.class...
 processing com/google/android/gms/auth/api/signin/zza.class...
 processing com/google/android/gms/auth/api/signin/zzb.class...
 processing com/google/android/gms/auth/api/signin/zzc.class...
 processing com/google/android/gms/auth/api/signin/zzd.class...
 ignored resource com/google/android/gms/common/
 processing com/google/android/gms/common/ErrorDialogFragment.class...
 processing com/google/android/gms/common/GoogleApiAvailability.class...
 processing com/google/android/gms/common/GoogleApiAvailability$zza.class...
 processing com/google/android/gms/common/GooglePlayServicesUtil.class...
 processing com/google/android/gms/common/SignInButton.class...
 processing com/google/android/gms/common/SignInButton$ButtonSize.class...
 processing com/google/android/gms/common/SignInButton$ColorScheme.class...
 processing com/google/android/gms/common/SupportErrorDialogFragment.class...
 ignored resource com/google/android/gms/common/api/
 processing com/google/a<message truncated>

ive been searching through google and can't really find anything to fix this error. if anyone has found a solution before, please let me know thanks.