diff --git a/src/main/java/a8k/db/AppUser.java b/src/main/java/a8k/db/AppUser.java
index 7aa5970..8a97350 100644
--- a/src/main/java/a8k/db/AppUser.java
+++ b/src/main/java/a8k/db/AppUser.java
@@ -10,13 +10,13 @@ public class AppUser extends UfActiveRecord {
 
 	@JsonIgnore
 	@UfActiveRecordField
-	public String password;
+	public String password = "";
 
 	@UfActiveRecordField
-	public Integer isAdmin;
+	public Integer isAdmin = 0;
 
 	@UfActiveRecordField
-	public Integer isBuiltInUser;
+	public Integer isBuiltInUser = 0;
 
 	// get table name
 	public static String getTableName() {
@@ -29,10 +29,16 @@ public class AppUser extends UfActiveRecord {
 	}
 
 	public Boolean isAdmin() {
+		if (isAdmin == null) {
+			return false;
+		}
 		return isAdmin != 0;
 	}
 
 	public Boolean isBuiltInUser() {
+		if (isBuiltInUser == null) {
+			return false;
+		}
 		return isBuiltInUser != 0;
 	}
 }
diff --git a/src/main/java/a8k/service/hardware/canbus/protocol/A8kEcode.java b/src/main/java/a8k/service/hardware/canbus/protocol/A8kEcode.java
index a828fa9..39382d4 100644
--- a/src/main/java/a8k/service/hardware/canbus/protocol/A8kEcode.java
+++ b/src/main/java/a8k/service/hardware/canbus/protocol/A8kEcode.java
@@ -34,7 +34,8 @@ public enum A8kEcode {
 
 	PasswdError(100, "密码错误"), //
 	UsrNotExitError(101, "用户不存在"), //
-
+	UsrExistError(102, "用户已存在"), //
+	UsrNotAllowBeDeleted(103, "用户不允许被删除"), //
 
 	//
 	//	FOR HARDWARE
diff --git a/src/main/java/a8k/service/usermgr/AppUserMgrService.java b/src/main/java/a8k/service/usermgr/AppUserMgrService.java
index 5698c27..a0da737 100644
--- a/src/main/java/a8k/service/usermgr/AppUserMgrService.java
+++ b/src/main/java/a8k/service/usermgr/AppUserMgrService.java
@@ -63,4 +63,45 @@ public class AppUserMgrService {
 	public AppRet<List<AppUser>> loginList() {
 		return AppRet.success(getUserList());
 	}
+
+	public AppRet<AppUser> addUser(String account, String password, int isAdmin) {
+		if (getUser(account) != null) {
+			return AppRet.fail(A8kEcode.UsrExistError);
+		}
+		var user = new AppUser();
+		user.account  = account;
+		user.password = password;
+		user.isAdmin  = isAdmin;
+		user.save();
+		return AppRet.success(user);
+	}
+
+	public AppRet<AppUser> delUser(String account) {
+		var user = getUser(account);
+		if (user == null) {
+			return AppRet.fail(A8kEcode.UsrNotExitError);
+		}
+		if (user.isBuiltInUser == 1) {
+			return AppRet.fail(A8kEcode.UsrNotAllowBeDeleted);
+		}
+		user.delete();
+		return AppRet.success(user);
+	}
+
+	public AppRet<AppUser> modifyUser(String account, String password, int isAdmin) {
+		var user = getUser(account);
+		if (user == null) {
+			return AppRet.fail(A8kEcode.UsrNotExitError);
+		}
+		user.password = password;
+		user.isAdmin  = isAdmin;
+		user.save();
+		return AppRet.success(user);
+	}
+
+	public AppRet<AppUser> getLoginUsrInfo() {
+		return AppRet.success(loginUsr);
+	}
+
+
 }
diff --git a/zhaohe_app.db b/zhaohe_app.db
index b169a85..465c4ef 100644
Binary files a/zhaohe_app.db and b/zhaohe_app.db differ