Firebase OTP auth can't handle with wrong OTP code. The problem was not solved. coz, credential.token != null is always true.

[ShohidulProgrammer]

The problem was not solved. coz, credential.token != null is always true.
so, I never can call the "signIn(credential)" method.
If I input the right OTP code without checking the credential.token != null condition then it can create a user.
but, I also want to check whether the input wrong/ invalid OTP code.
if invalid OTP code inputted then the unhandled exception occurred which I already mentioned above.

Originally posted by @ShohidulProgrammer in #3626 (comment)