Atoi acts just as strconv.Atoi, except it also provides a centrilized error handling.

GenerateJWT sets expiration date to 24 hours, generates a new JWT, signs and returns the token string.

GetPasswordHashByEmail retrieves the password hash by email.

GetUserIDByUsername retrieves the user ID by username.

IsExistingCreds checks if the email and/or username are present in the db.

IsExistingEmail checks if the email is present in the db.

IsExistingEmail checks if the username is present in the db.

IsValidEmail is a regex for email validation.

IsValidName is a regex for name validation It returns an error if the name is invalid, nil otherwise.

ShouldBindJSON acts just as c.ShouldBindJSON, except it also provides a centralized error handling.

ValidateJWT checks the given token string by its expiration date, signature, and validity.

Claims represents the JWT claims.