It is an simple JAVA API design using Spring Boot, Tomcat and "Json Web Token (Jwt)" based authentication. I used Amazon Web Service (AWS) and Mongodb to store my data. 

0. Welocome page:['GET']	loacalhost:8080	return/response : welome to Java Microservices {numberOfDocuments}. 1. GET request to log in to exiting account:['GET'] If you run on loacalhost:8080 http://localhost:8080/login?username=testuser1&password=password	return {"success":true,"token":"You successfully logged in!"} or {"success":false,"token":"error message"} 2. POST request to create a new account:['POST']	http://localhost:8080/createAccount accountBody => {	"username":"testuser1",	"password":"password"	}	return/response => {	"success": true, "token": "A new account has been created"	} 3. update user password: ['PUT']	http://localhost:8080/update_password accountBody => {	"username":"testuser1",	"password":"new_passowrd"	}	return/response => {	"success": true, "token": "password was successfully changed"	}