implemented user login restful API

src/main/resources/application.properties

@@ -5,4 +5,4 @@ spring.redis.host=localhost
 spring.redis.port=6379
 spring.datasource.url=jdbc:mysql://localhost:3306/irext?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
 spring.datasource.username=root
-spring.datasource.password=root
+spring.datasource.password=421aWill.