diff --git a/src/common/utils.js b/src/common/utils.js
index baa93c69..92d8f45f 100644
--- a/src/common/utils.js
+++ b/src/common/utils.js
@@ -273,13 +273,28 @@ class CustomError extends Error {
   constructor(message, type) {
     super(message);
     this.type = type;
-    this.secondaryMessage = SECONDARY_ERROR_MESSAGES[type] || "adsad";
+    this.secondaryMessage = SECONDARY_ERROR_MESSAGES[type] || type;
   }
 
   static MAX_RETRY = "MAX_RETRY";
   static USER_NOT_FOUND = "USER_NOT_FOUND";
 }
 
+class MissingParamError extends Error {
+  /**
+   * @param {string[]} missedParams
+   * @param {string?=} secondaryMessage
+   */
+  constructor(missedParams, secondaryMessage) {
+    const msg = `Missing params ${missedParams
+      .map((p) => `"${p}"`)
+      .join(", ")} make sure you pass the parameters in URL`;
+    super(msg);
+    this.missedParams = missedParams;
+    this.secondaryMessage = secondaryMessage;
+  }
+}
+
 /**
  * @see https://stackoverflow.com/a/48172630/10629172
  * @param {string} str
@@ -372,6 +387,7 @@ module.exports = {
   logger,
   CONSTANTS,
   CustomError,
+  MissingParamError,
   lowercaseTrim,
   chunkArray,
   parseEmojis,
diff --git a/src/fetchers/repo-fetcher.js b/src/fetchers/repo-fetcher.js
index 4490adb2..0bad5f2b 100644
--- a/src/fetchers/repo-fetcher.js
+++ b/src/fetchers/repo-fetcher.js
@@ -1,6 +1,6 @@
 // @ts-check
 const retryer = require("../common/retryer");
-const { request } = require("../common/utils");
+const { request, MissingParamError } = require("../common/utils");
 
 /**
  * @param {import('Axios').AxiosRequestHeaders} variables
@@ -48,15 +48,19 @@ const fetcher = (variables, token) => {
   );
 };
 
+const urlExample = "/api/pin?username=USERNAME&repo=REPO_NAME";
+
 /**
  * @param {string} username
  * @param {string} reponame
  * @returns {Promise<import("./types").RepositoryData>}
  */
 async function fetchRepo(username, reponame) {
-  if (!username || !reponame) {
-    throw new Error("Invalid username or reponame");
+  if (!username && !reponame) {
+    throw new MissingParamError(["username", "repo"], urlExample);
   }
+  if (!username) throw new MissingParamError(["username"], urlExample);
+  if (!reponame) throw new MissingParamError(["repo"], urlExample);
 
   let res = await retryer(fetcher, { login: username, repo: reponame });
 
diff --git a/src/fetchers/stats-fetcher.js b/src/fetchers/stats-fetcher.js
index 1caa62d1..04b4b3e5 100644
--- a/src/fetchers/stats-fetcher.js
+++ b/src/fetchers/stats-fetcher.js
@@ -4,7 +4,12 @@ const githubUsernameRegex = require("github-username-regex");
 
 const retryer = require("../common/retryer");
 const calculateRank = require("../calculateRank");
-const { request, logger, CustomError } = require("../common/utils");
+const {
+  request,
+  logger,
+  CustomError,
+  MissingParamError,
+} = require("../common/utils");
 
 require("dotenv").config();
 
@@ -103,7 +108,7 @@ async function fetchStats(
   count_private = false,
   include_all_commits = false,
 ) {
-  if (!username) throw Error("Invalid username");
+  if (!username) throw new MissingParamError(["username"]);
 
   const stats = {
     name: "",
diff --git a/src/fetchers/top-languages-fetcher.js b/src/fetchers/top-languages-fetcher.js
index 555b454b..9dd109e2 100644
--- a/src/fetchers/top-languages-fetcher.js
+++ b/src/fetchers/top-languages-fetcher.js
@@ -1,5 +1,5 @@
 // @ts-check
-const { request, logger } = require("../common/utils");
+const { request, logger, MissingParamError } = require("../common/utils");
 const retryer = require("../common/retryer");
 require("dotenv").config();
 
@@ -45,7 +45,7 @@ const fetcher = (variables, token) => {
  * @returns {Promise<import("./types").TopLangData>}
  */
 async function fetchTopLanguages(username, exclude_repo = []) {
-  if (!username) throw Error("Invalid username");
+  if (!username) throw new MissingParamError(["username"]);
 
   const res = await retryer(fetcher, { login: username });
 
diff --git a/src/fetchers/wakatime-fetcher.js b/src/fetchers/wakatime-fetcher.js
index f8080e82..e9779d60 100644
--- a/src/fetchers/wakatime-fetcher.js
+++ b/src/fetchers/wakatime-fetcher.js
@@ -1,15 +1,18 @@
 const axios = require("axios");
+const { MissingParamError } = require("../common/utils");
 
 /**
  * @param {{username: string, api_domain: string, range: string}} props
- * @returns {Promise<WakaTimeData>} 
+ * @returns {Promise<WakaTimeData>}
  */
 const fetchWakatimeStats = async ({ username, api_domain, range }) => {
+  if (!username) throw new MissingParamError(["username"]);
+  
   try {
     const { data } = await axios.get(
       `https://${
         api_domain ? api_domain.replace(/\/$/gi, "") : "wakatime.com"
-      }/api/v1/users/${username}/stats/${range || ''}?is_including_today=true`,
+      }/api/v1/users/${username}/stats/${range || ""}?is_including_today=true`,
     );
 
     return data.data;
diff --git a/tests/fetchWakatime.test.js b/tests/fetchWakatime.test.js
index 9ff7cc15..6255890c 100644
--- a/tests/fetchWakatime.test.js
+++ b/tests/fetchWakatime.test.js
@@ -207,7 +207,7 @@ describe("Wakatime fetcher", () => {
     mock.onGet(/\/https:\/\/wakatime\.com\/api/).reply(404, wakaTimeData);
 
     await expect(fetchWakatimeStats("noone")).rejects.toThrow(
-      "Wakatime user not found, make sure you have a wakatime profile",
+      "Missing params \"username\" make sure you pass the parameters in URL",
     );
   });
 });