SQL> alter user hr identified by HR; User altered. SQL> conn hr/hr@orcl. ERROR: ORA-01017: invalid username/password; logon denied. As you can see, IDENTIFIED BY clause treats password as a case-sensitive string with or without quotation marks. That is, you have to use it case-sensitively. SQL> conn hr/HR@ora19cdb. Sql developer always tries to authorize by substituting to the user name "\". SLQPLUS substitutes only the user name. When adding a domain to the user name. OSAUTH_PREFIX_DOMAIN = TRUE (windows registry). Sqlplus appends the domain name to the name. Sql developer always tries to authorize by substituting to the user name "\" without domain name Either the access code is invalid or the OAuth token is revoked.Details: invalid _grant Hot Network Questions Independent researcher being solicited for an academic collaboration. The response body should contain information on whether the password matches or not, but this has no impact on the status code since the request was authorized and parsed successfully. A response code of 401 would indicate that the front-end token is invalid, not the user's password. .

invalid username or password