def __security_definitions_descriptor(self, issuers):
if not issuers:<EOL><INDENT>result = {<EOL>_DEFAULT_SECURITY_DEFINITION: {<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT:type>': '<STR_LIT>',<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>}<EOL>}<EOL>return result<EOL><DEDENT>result = {}<EOL>for issuer_key, issuer_value in issuers.items():<EOL><INDENT>result[issuer_key] = {<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT:type>': '<STR_LIT>',<EOL>'<STR_LIT>': issuer_value.issuer,<EOL>}<EOL>if issuer_value.jwks_uri:<EOL><INDENT>result[issuer_key]['<STR_LIT>'] = issuer_value.jwks_uri<EOL><DEDENT><DEDENT>return result<EOL>
Create a descriptor for the security definitions.

        Args:
          issuers: dict, mapping issuer names to Issuer tuples

        Returns:
          The dict representing the security definitions descriptor.