Interface for a provider that generates AppCheckTokens. This provider can be called at
any time by any Firebase library that depends (optionally or otherwise) on AppCheckTokens. This provider is responsible for determining if it can create a new token at the
time of the call and returning that new token if it can.
| abstract Task<AppCheckToken> |
getToken()
Returns a
Task which resolves to a valid AppCheckToken or an Exception
in the case that an unexpected failure occurred while getting the token. |
Returns a Task which resolves to a valid AppCheckToken or an Exception
in the case that an unexpected failure occurred while getting the token.