(PECL OAuth >= 1.0.0)
OAuthProvider::calltokenHandler — Calls the tokenNonceHandler callback
public OAuthProvider::calltokenHandler ( ) : void
Calls the registered token handler callback function, which is set with OAuthProvider::tokenHandler().
This function is currently not documented; only its argument list is available.
This function has no parameters.
No value is returned.
 Emits an E_ERROR level error if the callback function cannot be called, or was not specified. 
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    https://www.php.net/manual/en/oauthprovider.calltokenhandler.php