diff --git a/backend/typescript/models/user.model.ts b/backend/typescript/models/user.model.ts
index 051764f..3cb36ce 100644
--- a/backend/typescript/models/user.model.ts
+++ b/backend/typescript/models/user.model.ts
@@ -15,7 +15,7 @@ export default class User extends Model {
   @Column({ type: DataType.STRING })
   auth_id!: string;
 
-  @Column({ type: DataType.INTEGER })
+  @Column({ type: DataType.INTEGER, primaryKey: true })
   id!: number;
 
   @Column({ type: DataType.ENUM("User", "Admin") })
diff --git a/backend/typescript/nodemailer.config.ts b/backend/typescript/nodemailer.config.ts
index 35ddd37..4e1dc02 100644
--- a/backend/typescript/nodemailer.config.ts
+++ b/backend/typescript/nodemailer.config.ts
@@ -1,5 +1,7 @@
+import dotenv from "dotenv";
 import { NodemailerConfig } from "./types";
 
+dotenv.config();
 const config: NodemailerConfig = {
   service: "gmail",
   auth: {
diff --git a/backend/typescript/package.json b/backend/typescript/package.json
index fbb1954..cd06eb6 100644
--- a/backend/typescript/package.json
+++ b/backend/typescript/package.json
@@ -4,7 +4,7 @@
   "description": "",
   "main": "server.ts",
   "scripts": {
-    "test": "jest --runInBand --forceExit --detectOpenHandles",
+    "test": "jest --runInBand --forceExit",
     "dev": "nodemon -L",
     "lint": "eslint . --ext .ts,.js",
     "fix": "eslint . --ext .ts,.js --fix",
@@ -24,7 +24,7 @@
     "apollo-server-express": "^2.22.2",
     "cookie-parser": "^1.4.5",
     "cors": "^2.8.5",
-    "dotenv": "^8.2.0",
+    "dotenv": "^16.0.3",
     "express": "^4.17.1",
     "firebase-admin": "^9.5.0",
     "graphql": "^15.5.0",
diff --git a/backend/typescript/services/implementations/__tests__/sendEmail.test.ts b/backend/typescript/services/implementations/__tests__/sendEmail.test.ts
new file mode 100644
index 0000000..2a95ca3
--- /dev/null
+++ b/backend/typescript/services/implementations/__tests__/sendEmail.test.ts
@@ -0,0 +1,15 @@
+import EmailService from "../emailService";
+import IEmailService from "../../interfaces/emailService";
+import nodemailerConfig from "../../../nodemailer.config";
+
+const emailService: IEmailService = new EmailService(nodemailerConfig);
+
+describe("sendEmail", () => {
+  it("sendEmail", async () => {
+    await emailService.sendEmail(
+      "hyunzeekim@uwblueprint.org",
+      "Test subject",
+      "Test body",
+    );
+  });
+});
diff --git a/backend/typescript/yarn.lock b/backend/typescript/yarn.lock
index f8d4985..37c3d97 100644
--- a/backend/typescript/yarn.lock
+++ b/backend/typescript/yarn.lock
@@ -2655,11 +2655,16 @@ dot-prop@^5.2.0:
   dependencies:
     is-obj "^2.0.0"
 
-dotenv@*, dotenv@^8.2.0:
+dotenv@*:
   version "8.2.0"
   resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-8.2.0.tgz#97e619259ada750eea3e4ea3e26bceea5424b16a"
   integrity sha512-8sJ78ElpbDJBHNeBzUbUVLsqKdccaa/BXF1uPTw3GrvQTBgrQrtObr2mUrE38vzYd8cEv+m/JBfDLioYcfXoaw==
 
+dotenv@^16.0.3:
+  version "16.0.3"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-16.0.3.tgz#115aec42bac5053db3c456db30cc243a5a836a07"
+  integrity sha512-7GO6HghkA5fYG9TYnNxi14/7K9f5occMlp3zXAuSxn7CKCxt9xbNWG7yF8hTCSUchlfWSe3uLmlPfigevRItzQ==
+
 dottie@^2.0.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/dottie/-/dottie-2.0.2.tgz#cc91c0726ce3a054ebf11c55fbc92a7f266dd154"