diff --git a/src/auth/auth.controller.ts b/src/auth/auth.controller.ts
index 26b1d05..b39d810 100644
--- a/src/auth/auth.controller.ts
+++ b/src/auth/auth.controller.ts
@@ -2,23 +2,20 @@ import { Body, Controller, HttpCode, HttpStatus, Post } from "@nestjs/common";
 import { SignUpDto } from "src/auth/auth.dto";
 import { AuthService } from "src/auth/auth.service";
 
-@Controller('auth')
+@Controller("auth")
 export class AuthController {
-  constructor(private readonly authService: AuthService) {
-  }
+	constructor(private readonly authService: AuthService) {}
 
-  //POST signup
-  @HttpCode(HttpStatus.CREATED)
-  @Post("signup")
-  async signUp(@Body() dto: SignUpDto) {
-    console.log(dto)
-    return this.authService.doRegister(dto)
-  }
+	//POST signup
+	@HttpCode(HttpStatus.CREATED)
+	@Post("signup")
+	async signUp(@Body() dto: SignUpDto) {
+		console.log(dto);
+		return this.authService.doRegister(dto);
+	}
 
-
-
-  //POST signin
-  //GET me -- Get current user data via jwt
-  //DELETE me
-  //PATCH me
+	//POST signin
+	//GET me -- Get current user data via jwt
+	//DELETE me
+	//PATCH me
 }
diff --git a/src/auth/auth.dto.ts b/src/auth/auth.dto.ts
index 0f9f005..faf1beb 100644
--- a/src/auth/auth.dto.ts
+++ b/src/auth/auth.dto.ts
@@ -47,4 +47,4 @@ export class SignInDto {
 		minSymbols: 1,
 	})
 	password: string;
-}
\ No newline at end of file
+}
diff --git a/src/auth/auth.schema.ts b/src/auth/auth.schema.ts
index 21cf3e3..2f4677c 100644
--- a/src/auth/auth.schema.ts
+++ b/src/auth/auth.schema.ts
@@ -29,3 +29,9 @@ export const SignInBodySchema = z.object({
 		.min(6)
 		.max(32),
 });
+
+export const UserUpdateSchema = z.object({
+	firstName: z.string({ message: "'firstName' should be a string." }).max(24),
+
+	lastName: z.string({ message: "'lastName' should be a string." }).max(24),
+});
diff --git a/src/auth/auth.service.ts b/src/auth/auth.service.ts
index 62d1d3d..953dc74 100644
--- a/src/auth/auth.service.ts
+++ b/src/auth/auth.service.ts
@@ -1,15 +1,15 @@
-import * as console from "node:console";
 import {
 	Injectable,
 	OnModuleInit,
 	UnauthorizedException,
 } from "@nestjs/common";
 import { eq } from "drizzle-orm";
-import { SignUpBodySchema } from "src/auth/auth.schema";
+import { SignInDto, SignUpDto } from "src/auth/auth.dto";
+import { UserUpdateSchema } from "src/auth/auth.schema";
 import { CredentialsService } from "src/credentials/credentials.service";
 import { DrizzleService } from "src/drizzle/drizzle.service";
 import { UsersTable } from "src/schema";
-import { SignInDto, SignUpDto } from "src/auth/auth.dto";
+import { IUserUpdateData } from "src/auth/auth.types";
 
 @Injectable()
 export class AuthService implements OnModuleInit {
@@ -49,32 +49,91 @@ export class AuthService implements OnModuleInit {
 			});
 		return {
 			message: "User created, check your email for validation.",
-			token: await this.credentials.signAuthToken({sub: query[0].uuid})
-		}
+			token: await this.credentials.signAuthToken({ sub: query[0].uuid }),
+		};
 	}
 
-	doLogin(data: SignInDto) {}
+	async doLogin(data: SignInDto) {
+		const user = await this.db
+			.use()
+			.select()
+			.from(UsersTable)
+			.where(eq(UsersTable.email, data.email))
+			.prepare("userByEmail")
+			.execute();
+		if (user.length !== 1)
+			throw new UnauthorizedException("Invalid credentials");
+		const passwordMatch = await this.credentials.check(
+			data.password,
+			user[0].hash,
+		);
+		if (!passwordMatch) throw new UnauthorizedException("Invalid credentials");
+		const token = await this.credentials.signAuthToken({ sub: user[0].uuid });
+		return {
+			message: "Login successful",
+			token: token,
+		};
+	}
 
 	async fetchUser(userId: string) {
 		//TODO Pagination
 		const usersInDb = await this.db.use().select().from(UsersTable);
 		const result = {
 			total: usersInDb.length,
-			users: usersInDb.map((user)=>{
-				delete user.hash
+			users: usersInDb.map((user) => {
+				delete user.hash;
 				return {
-					...user
-				}
-			})
-		}
-		console.log(result)
+					...user,
+				};
+			}),
+		};
+		console.log(result);
+	}
+
+	async updateUser(targetId: string, userData: IUserUpdateData) {
+		const validationResult = UserUpdateSchema.safeParse(userData);
+    if (!validationResult.success) {
+      throw new UnauthorizedException(validationResult.error);
+    }
+    const updateQuery = await this.db
+      .use()
+      .update(UsersTable)
+      .set({
+				...userData
+			})
+      .where(eq(UsersTable.uuid, targetId))
+      .prepare("updateUserById")
+      .execute()
+      .catch((err) => {
+        console.error(err);
+        throw new UnauthorizedException(
+          "Error occurred while updating user",
+          err,
+        );
+      });
+    return true;
+	}
+
+	async deleteUser(targetId: string) {
+		await this.db
+			.use()
+			.delete(UsersTable)
+			.where(eq(UsersTable.uuid, targetId))
+			.prepare("deleteUserById")
+			.execute()
+			.catch((err) => {
+				console.error(err);
+				throw new UnauthorizedException(
+					"Error occurred while deleting user",
+					err,
+				);
+			});
+		return true;
 	}
-	updateUser() {}
-	deleteUser() {}
 
 	async onModuleInit() {
-		setTimeout(()=>{
+		setTimeout(() => {
 			this.fetchUser("ee");
-		}, 2000)
+		}, 2000);
 	}
 }
diff --git a/src/auth/auth.types.ts b/src/auth/auth.types.ts
new file mode 100644
index 0000000..8fb047c
--- /dev/null
+++ b/src/auth/auth.types.ts
@@ -0,0 +1,4 @@
+export interface IUserUpdateData {
+  firstName?: string;
+  lastName?: string;
+}
\ No newline at end of file