Not Implemented

The 501 Not Implemented HTTP status code is used when the web server does not support the functionality required to fulfill the request. Unlike the 500 Internal Server Error, which indicates a problem in executing a well-understood request, a 501 error signifies that the server either lacks the capability to perform the requested action or such functionality is not yet implemented. This response could occur if a client sends a HTTP request method that the server does not support or has no intention of supporting. For instance, if a server does not support certain features of the HTTP protocol that might be used in future versions. It's important for developers to note that a 501 error does not imply a temporary issue; instead, it suggests the need for an adjustment in the request or a change in the client's interaction protocol.