[[FIRAuth auth] signInWithEmail:emailTxt.text
                               password:pwdStr
                             completion:^(FIRUser *user, NSError *error) {
                                 // ...
                                 NSLog(@"User: %@nUserEmail:%@nError:%@",user.uid,user.email,error);
                                 NSLog(user.isEmailVerified ? @"Verified = Yes" : @"Verified = No");
                                 [[NSUserDefaults standardUserDefaults] setObject:user.uid forKey:@"userid"];


                                 if(error == nil){
                                     if (user.isEmailVerified) {


                                         self.ref = [[FIRDatabase database] reference];
                                         NSString *userID = [FIRAuth auth].currentUser.uid;


                                         [[_ref child:[NSString stringWithFormat:@"users/user/%@",userID]] observeSingleEventOfType:FIRDataEventTypeValue withBlock:^(FIRDataSnapshot * _Nonnull snapshot) {

                                             // Get user value
                                             NSLog(@"%@",snapshot.value);
                                             // ...



                                         } withCancelBlock:^(NSError * _Nonnull error) {
                                             NSLog(@"%@", error.localizedDescription);
                                         }];


                             }];