Implementation of login endpoint.

sportshub-domain/src/main/java/org/sportshub/domain/exception/FunctionnalException.java

@@ -0,0 +1,7 @@
+package org.sportshub.domain.exception;
+
+public abstract class FunctionnalException extends RuntimeException {
+    public FunctionnalException(final String message) {
+        super(message);
+    }
+}

sportshub-domain/src/main/java/org/sportshub/domain/exception/LoginFailureException.java

@@ -0,0 +1,7 @@
+package org.sportshub.domain.exception;
+
+public class LoginFailureException extends FunctionnalException {
+    public LoginFailureException() {
+        super("Login or password incorrect.");
+    }
+}