diff --git a/server/src/main/java/com/vpr/server/controller/AuthController.java b/server/src/main/java/com/vpr/server/controller/AuthController.java
index 31bbe08..1c6d1e2 100644
--- a/server/src/main/java/com/vpr/server/controller/AuthController.java
+++ b/server/src/main/java/com/vpr/server/controller/AuthController.java
@@ -2,9 +2,6 @@ package com.vpr.server.controller;
 
 import com.vpr.server.data.User;
 import com.vpr.server.repository.UserRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.RequestMapping;
 
 public class AuthController {
 
diff --git a/server/src/main/java/com/vpr/server/controller/EventController.java b/server/src/main/java/com/vpr/server/controller/EventController.java
index ba1e9e2..af699bd 100644
--- a/server/src/main/java/com/vpr/server/controller/EventController.java
+++ b/server/src/main/java/com/vpr/server/controller/EventController.java
@@ -1,9 +1,9 @@
 package com.vpr.server.controller;
 
+import com.vpr.server.dao.interfaces.EventDAO;
 import com.vpr.server.data.Event;
 import com.vpr.server.data.User;
 import com.vpr.server.data.UserEvent;
-import com.vpr.server.dao.interfaces.EventDAO;
 import com.vpr.server.json.JSONMapper;
 import com.vpr.server.json.Validator;
 import com.vpr.server.repository.EventRepository;
diff --git a/server/src/main/java/com/vpr/server/controller/MainController.java b/server/src/main/java/com/vpr/server/controller/MainController.java
index 7435fbb..3f4cbcd 100644
--- a/server/src/main/java/com/vpr/server/controller/MainController.java
+++ b/server/src/main/java/com/vpr/server/controller/MainController.java
@@ -1,8 +1,5 @@
 package com.vpr.server.controller;
 
-import com.vpr.server.data.Event;
-import com.vpr.server.data.User;
-import com.vpr.server.data.UserEvent;
 import com.vpr.server.repository.EventRepository;
 import com.vpr.server.repository.UserEventRepository;
 import com.vpr.server.repository.UserRepository;
@@ -10,12 +7,12 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.*;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.server.ResponseStatusException;
 
-import java.sql.Time;
-import java.text.SimpleDateFormat;
-
 @Controller // This means that this class is a Controller
 @RequestMapping(path = "/vpr") // This means URL's start with /demo (after Application path)
 public class MainController {
diff --git a/server/src/main/java/com/vpr/server/controller/UserController.java b/server/src/main/java/com/vpr/server/controller/UserController.java
index 5cb3090..2f43906 100644
--- a/server/src/main/java/com/vpr/server/controller/UserController.java
+++ b/server/src/main/java/com/vpr/server/controller/UserController.java
@@ -1,7 +1,6 @@
 package com.vpr.server.controller;
 
 import com.vpr.server.dao.interfaces.UserDAO;
-import com.vpr.server.data.Event;
 import com.vpr.server.data.User;
 import com.vpr.server.json.JSONMapper;
 import com.vpr.server.repository.UserRepository;
diff --git a/server/src/main/java/com/vpr/server/dao/implementation/UserDAOImplementation.java b/server/src/main/java/com/vpr/server/dao/implementation/UserDAOImplementation.java
index c3c44da..d3e56ac 100644
--- a/server/src/main/java/com/vpr/server/dao/implementation/UserDAOImplementation.java
+++ b/server/src/main/java/com/vpr/server/dao/implementation/UserDAOImplementation.java
@@ -1,7 +1,6 @@
 package com.vpr.server.dao.implementation;
 
 import com.vpr.server.dao.interfaces.UserDAO;
-import com.vpr.server.data.Event;
 import com.vpr.server.data.User;
 import org.springframework.stereotype.Repository;
 
diff --git a/server/src/main/java/com/vpr/server/data/UserEvent.java b/server/src/main/java/com/vpr/server/data/UserEvent.java
index 55c4112..c29fe3e 100644
--- a/server/src/main/java/com/vpr/server/data/UserEvent.java
+++ b/server/src/main/java/com/vpr/server/data/UserEvent.java
@@ -2,7 +2,6 @@ package com.vpr.server.data;
 
 import javax.persistence.*;
 import java.sql.Date;
-import java.util.Calendar;
 
 // @Entity creates a table out of this class with Hibernate
 // @Table defines the table-name
diff --git a/server/src/main/java/com/vpr/server/json/JSONMapper.java b/server/src/main/java/com/vpr/server/json/JSONMapper.java
index 066c47c..914af66 100644
--- a/server/src/main/java/com/vpr/server/json/JSONMapper.java
+++ b/server/src/main/java/com/vpr/server/json/JSONMapper.java
@@ -5,7 +5,6 @@ import com.vpr.server.data.User;
 import com.vpr.server.data.UserEvent;
 
 import java.sql.Time;
-
 import java.util.ArrayList;
 import java.util.List;
 
diff --git a/server/src/main/java/com/vpr/server/json/Validator.java b/server/src/main/java/com/vpr/server/json/Validator.java
index 54b3d98..15a4ced 100644
--- a/server/src/main/java/com/vpr/server/json/Validator.java
+++ b/server/src/main/java/com/vpr/server/json/Validator.java
@@ -1,9 +1,5 @@
 package com.vpr.server.json;
 
-import com.vpr.server.data.UserEvent;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.ResponseEntity;
-
 import java.sql.Date;
 import java.sql.Time;
 import java.text.SimpleDateFormat;
diff --git a/server/src/main/java/com/vpr/server/repository/EventRepository.java b/server/src/main/java/com/vpr/server/repository/EventRepository.java
index e76e91d..bb5d1c6 100644
--- a/server/src/main/java/com/vpr/server/repository/EventRepository.java
+++ b/server/src/main/java/com/vpr/server/repository/EventRepository.java
@@ -1,18 +1,11 @@
 package com.vpr.server.repository;
 
 import com.vpr.server.data.Event;
-import com.vpr.server.data.UserEvent;
 import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.CrudRepository;
 
-import javax.persistence.ColumnResult;
-import javax.persistence.ConstructorResult;
-import javax.persistence.NamedNativeQuery;
-import javax.persistence.SqlResultSetMapping;
 import javax.transaction.Transactional;
-import java.util.List;
-import java.util.Optional;
 
 // This will be AUTO IMPLEMENTED by Spring into a Bean called eventRepository
 // CRUD refers Create, Read, Update, Delete
diff --git a/server/src/main/java/com/vpr/server/security/Token.java b/server/src/main/java/com/vpr/server/security/Token.java
index 4f9a4c0..7b94987 100644
--- a/server/src/main/java/com/vpr/server/security/Token.java
+++ b/server/src/main/java/com/vpr/server/security/Token.java
@@ -4,11 +4,12 @@ import io.jsonwebtoken.JwtException;
 import io.jsonwebtoken.Jwts;
 import io.jsonwebtoken.SignatureAlgorithm;
 import io.jsonwebtoken.security.Keys;
+
 import java.security.Key;
 
 public class Token {
 
-    private static Key KEY = Keys.secretKeyFor(SignatureAlgorithm.HS256);
+    private static final Key KEY = Keys.secretKeyFor(SignatureAlgorithm.HS256);
 
     public static String Generate(String subject){
         return Jwts.builder().setSubject(subject).signWith(KEY).compact();