MetaMask

Signing Data. MetaMask lets you request cryptographic signatures from users in a number of ways. eth_signTypedData_v4 for the most readable signatures

Click on Dashboard. You will see your dashboard with all the data (none in the beginning): Now, you have to add your code to authenticate the user to, later on, be added to the database. To make this work, you have to import a few scripts to your code. The following will show you two of the scripts you need.