cleaned the login process

backend/src/main/java/ovh/herisson/Clyde/Services/AuthenticatorService.java

@@ -0,0 +1,32 @@
+package ovh.herisson.Clyde.Services;
+
+import org.springframework.stereotype.Service;
+import ovh.herisson.Clyde.Tables.User;
+
+import java.util.Date;
+
+@Service
+public class AuthenticatorService {
+
+    private final TokenService tokenService;
+    private final UserService userService;
+
+    public AuthenticatorService(TokenService tokenService, UserService userService){
+        this.tokenService = tokenService;
+        this.userService = userService;
+    }
+
+    public User getUserFromToken(String token){
+        return tokenService.getUserFromToken(token);
+    }
+
+
+    public String login(String identifier, String password, Date expirationDate){
+        User user = userService.getUser(identifier);
+        if (user == null){return null;}
+        if (!userService.checkPassword(user,password)){return null;}
+        String token = tokenService.generateNewToken();
+        tokenService.saveToken(token,user,expirationDate);
+        return token;
+    }
+}