Applications that require server-side implementation often require the clients (mobile apps or web browsers) to authenticate themselves to the server. For instance, when someone uses Chrome to access Facebook after logging in before, they communicate specific information to the Facebook server proving their identity. Logging with social media is just one way of user authentication. But I should also mention the authentication through Gmail, with other services/integrations, that are related to the initial app, or generally with Operation System recognition. In both cases, the custom user authentication needs to be set up, so we are going to define the major ways for the developer.
Ways To Build Custom User Authentication
The software can implement bespoke user authentication in a variety of methods. Some of them require full custom coding, and others are easier to apply.