authentication error

Authentication error is a commonly encountered problem in the online world, and it can be quite an inconvenience. Authentication errors occur when the credentials used for logging into a website, service, or application do not match. This could be due to a wrong username and/or password, an expired session, or any other details that may have been inputted incorrectly.
Most authentication errors can easily be fixed. First, double-check that the information given is correct. Pay special attention to easy-to-miss typos and capitalizations. If the problem is due to an outdated information, such as an expired password, then use the reset option and enter the updated information.
Some authentication errors may indicate other issues, however. If the previously correct credentials are not accepted or if there is a longer than usual delay, then this may indicate some sort of security breach. In such cases, it is best to contact the website or service in question as soon as possible.
An authentication error is not only a hassle but also a possible indication of a security vulnerability. Always make sure that the credentials used are up to date, and if any issues should arise, act quickly to resolve them.