Tutorial: Sign in user automatically after sign-up in an Android app
This tutorial demonstrates how to sign in user automatically after sign-up in an Android app by using native authentication.
In this tutorial, you learn how to:
- Sign in after sign-up.
- Handle errors.
Prerequisites
- Complete the steps Sign in users in a sample native Android mobile application. This article shows you how to run a sample Android that you configure by using your tenant settings.
- Tutorial: Add sign-up in an Android mobile app using native authentication. The steps in this tutorial should work whether you sign up with email and password or email one-time passcode.
Sign in after sign-up
After a successful sign-up flow, you can automatically sign in your users without initiating a fresh sign-in flow.
The SignUpResult.Complete returns SignInContinuationState object. The SignInContinuationState object provides access to signIn() method.
To sign up a user with email and password, then automatically sign them in, use the following code snippet:
CoroutineScope(Dispatchers.Main).launch {
val signUpActionResult = authClient.signUp(
username = emailAddress,
password = password
)
if (SignUpActionResult is SignUpResult.CodeRequired) {
val nextState = signUpActionResult.nextState
val submitCodeActionResult = nextState.submitCode(
code = code
)
if (submitCodeActionResult is SignUpResult.Complete) {
// Handle sign up success
val signInContinuationState = actionResult.nextState
val signInActionResult = signInContinuationState.signIn()
if (signInActionResult is SignInResult.Complete) {
// Handle sign in success
val accountState = signInActionResult.resultValue
val accessTokenResult = accountState.getAccessToken()
if (accessTokenResult is GetAccessTokenResult.Complete) {
val accessToken = accessTokenResult.resultValue.accessToken
val idToken = accountState.getIdToken()
}
}
}
}
}
To retrieve ID token claims after sign-in, use the steps in Read ID token claims.
Handle sign-in errors
The SignInContinuationState.signIn() method returns SignInResult.Complete after a successful sign-in. It can also return an error.
To handle errors in SignInContinuationState.signIn(), use the following code snippet:
val signInContinuationState = actionResult.nextState
val signInActionResult = signInContinuationState.signIn()
when (signInActionResult) {
is SignInResult.Complete -> {
// Handle sign in success
displayAccount(accountState = actionResult.resultValue)
}
is SignInContinuationError -> {
// Handle unexpected error
}
else -> {
// Handle unexpected error
}
}
private fun displayAccount(accountState: AccountState) {
CoroutineScope(Dispatchers.Main).launch {
val accessTokenResult = accountState.getAccessToken()
if (accessTokenResult is GetAccessTokenResult.Complete) {
val accessToken = accessTokenResult.resultValue.accessToken
val idToken = accountState.getIdToken()
}
}
}