# `AshAtproto.Auth.SignInPreparation`

Prepare a query for sign in

Performs three main tasks:

  1. Ensures that there is only one matching user record returned, otherwise
     returns an authentication failed error.
  2. Generates an access token if token generation is enabled.
  3. Updates the user identity resource, if one is enabled.

# `init`

# `supports`

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*Consult [api-reference.md](api-reference.md) for complete listing*