CREATE SERVER testserver
FOREIGN DATA WRAPPER rdf_fdw 
OPTIONS (    
  endpoint 'https://dbpedia.org/sparql'
);
CREATE USER u1;
/* empty user name */
CREATE USER MAPPING FOR u1 SERVER testserver OPTIONS (user '', password 'foo');
ERROR:  empty value in option 'user'
/* empty password */
CREATE USER MAPPING FOR u1 SERVER testserver OPTIONS (user 'foo', password '');
ERROR:  empty value in option 'password'
/* invalid option */
CREATE USER MAPPING FOR u1 SERVER testserver OPTIONS (user 'jim', foo 'bar');
ERROR:  invalid rdf_fdw option 'foo'
/* empty token */
CREATE USER MAPPING FOR u1 SERVER testserver OPTIONS (token '');
ERROR:  empty value in option 'token'
/* token combined with user (mutually exclusive) */
CREATE USER MAPPING FOR u1 SERVER testserver OPTIONS (token 'secret', user 'admin');
ERROR:  options 'token' and 'user' cannot be combined
HINT:  Use 'token' for Bearer authentication (RFC 6750) or 'user'/'password' for HTTP Basic Authentication, but not both.
/* token combined with user and password (mutually exclusive) */
CREATE USER MAPPING FOR u1 SERVER testserver OPTIONS (token 'secret', user 'admin', password 'pass');
ERROR:  options 'token' and 'user' cannot be combined
HINT:  Use 'token' for Bearer authentication (RFC 6750) or 'user'/'password' for HTTP Basic Authentication, but not both.
/* valid token-only mapping */
CREATE USER MAPPING FOR u1 SERVER testserver OPTIONS (token 'secret');
/* clean up */
DROP SERVER testserver CASCADE;
NOTICE:  drop cascades to user mapping for u1 on server testserver
DROP USER u1;