 
 func blockUserWithUserID(userID: String, failureHandler: FailureHandler?, completion: Bool -> Void) {
 
-    let requestParameters = [
+    let requestParameters: JSONDictionary = [
         "user_id": userID
     ]
 


func searchUsersByMobile(mobile: String, failureHandler: FailureHandler?, completion: [JSONDictionary] -> Void) {
    
    let requestParameters = [
        "q": mobile
    ]
    


func sendVerifyCodeOfMobile(mobile: String, withAreaCode areaCode: String, useMethod method: VerifyCodeMethod, failureHandler: FailureHandler?, completion: Bool -> Void) {

    let requestParameters: JSONDictionary = [
        "mobile": mobile,
        "phone_code": areaCode,
        "method": method.rawValue
