how to make db in laravel using mysql for multiple users, like in my case Admin, Users, Agents, International Agents

i want to design a db for my project in laravel but confused how to manage tables. I have four entities Admin, Users, Agents and International Agents. Please help me how i manage my db tables. and if i make single table for multiple users then how to identify users. Note: Each of the mentioned entities are different. Please ask if it not sounds clear. Thanks

via Chebli Mohamed