@property<EOL><INDENT>def allowed_signature_methods(self):<DEDENT>
return self._config.get(<EOL>'<STR_LIT>',<EOL>SIGNATURE_METHODS,<EOL>)<EOL>
Allowed signature methods.

        Default value: SIGNATURE_HMAC and SIGNATURE_RSA.

        You can customize with Flask Config:

            - OAUTH1_PROVIDER_SIGNATURE_METHODS