I need to get the name of the current app in the controller. So far I'm trying:

public static String getAppName() {
         UserAppInfo userAppInfo = [SELECT Id, AppDefinitionId FROM UserAppInfo WHERE UserId = :UserInfo.getUserId() LIMIT 1];
        AppDefinition appDefinition = [SELECT DurableId, Label FROM AppDefinition Where DurableId = :userAppInfo.AppDefinitionId LIMIT 1];
       return appDefinition.Label;
    }

But Im getting 3 errors:

Line 1: No such column 'AppDefinitionId' on entity 'UserAppInfo'
Line 2: Invalid type: AppDefinition
Line 3: Variable does not exist: appDefinition

Can anyone provide some insight as to what I may be doing wrong? Thanks!