a gin gorm example

• user reg
• user login
• user logout
• change user password
• reset user password
• upload single file
• download single file
• upload user avatar
• update user profile
• bind login email
• bind login phone
• change login email
• change login phone
• send email message (eg.)
• send phone message (eg.)
• manage user address
• user address import
• user address export
• upload large file by chunk
• download large file by bytes