GymPass style app.

• Must be possible to register a gym;
• Must be possible to register an user;
• Must be possible to authenticate an user;
• Must be possible to get a logged in user's profile;
• Must be possible to get the number of check-ins made by the logged in user;
• Must be possible to validate an user's check-in;
• Must be possible for the user to get his check-ins historic;
• Must be possible for the user to find near gyms;
• Must be possible for the user to find gyms by name;
• Must be possible for the user to check-in to a gym;

• The user should not be able to register with a duplicated e-mail;
• The user should not be able to make 2 check-ins on the same day;
• The user should not be able to check-in if he isn't near (100m) the gym;
• The check-in can only be validated until 20 minutes after it is created;
• The check-in can only be validated by administrators;
• The gym can only be registered by administrators;

• User password must be hashed;
• Application data bust be persisted in a PostgreSQL database;
• All data list must be paginated with 20 items by page;
• User must be identified by a JWT;