started on gmail controller

src/main/java/com/safeqr/app/gmail/controller/GmailController.java

@@ -0,0 +1,33 @@
+package com.safeqr.app.gmail.controller;
+
+import com.safeqr.app.gmail.service.GmailService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Map;
+
+import static com.safeqr.app.constants.APIConstants.API_VERSION;
+
+@RestController
+@RequestMapping(API_VERSION)
+public class GmailController {
+    private static final Logger logger = LoggerFactory.getLogger(GmailController.class);
+    GmailService gmailService;
+    @Autowired
+    public GmailController(GmailService gmailService) {
+        this.gmailService = gmailService;
+    }
+
+    @GetMapping(value = "/gmail/authenticate", produces = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<?> authenticate() {
+        logger.info("Health Check");
+        return ResponseEntity.ok(Map.of("version", "SafeQR v1.0.2"));
+    }
+}
+