diff --git a/semana20/labook/.gitignore b/semana20/labook/.gitignore
new file mode 100644
index 0000000..7aee7a3
--- /dev/null
+++ b/semana20/labook/.gitignore
@@ -0,0 +1,3 @@
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\ No newline at end of file
diff --git a/semana20/labook/package-lock.json b/semana20/labook/package-lock.json
new file mode 100644
index 0000000..c0c81dc
--- /dev/null
+++ b/semana20/labook/package-lock.json
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+      "dev": true
+    },
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+    },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
+    "uuid": {
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
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+    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
+    },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
+      "dev": true
+    },
+    "yn": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
+      "dev": true
+    }
+  }
+}
diff --git a/semana20/labook/package.json b/semana20/labook/package.json
new file mode 100644
index 0000000..57e1585
--- /dev/null
+++ b/semana20/labook/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "labook",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "tsc && node build/tests",
+    "start": "tsc && node build/index"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "bcryptjs": "^2.4.3",
+    "cors": "^2.8.5",
+    "dotenv": "^10.0.0",
+    "express": "^4.17.2",
+    "jsonwebtoken": "^8.5.1",
+    "knex": "^0.95.15",
+    "mysql": "^2.18.1",
+    "uuid": "^8.3.2"
+  },
+  "devDependencies": {
+    "@types/bcryptjs": "^2.4.2",
+    "@types/cors": "^2.8.12",
+    "@types/express": "^4.17.13",
+    "@types/jsonwebtoken": "^8.5.6",
+    "@types/node": "^17.0.7",
+    "@types/uuid": "^8.3.3",
+    "ts-node-dev": "^1.1.8",
+    "typescript": "^4.5.4"
+  }
+}
diff --git a/semana20/labook/src/business/PostBusiness.ts b/semana20/labook/src/business/PostBusiness.ts
new file mode 100644
index 0000000..e3b5547
--- /dev/null
+++ b/semana20/labook/src/business/PostBusiness.ts
@@ -0,0 +1,14 @@
+import { PostDatabase } from "../data/PostDatabase"
+import { post } from "../model/Post"
+
+export class PostBusiness {
+
+  getPostById = async (
+    id: string
+  ) : Promise<post | undefined> => {
+
+    const post = await new PostDatabase().getPostById(id)
+
+    return post
+  }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/business/UserBusiness.ts b/semana20/labook/src/business/UserBusiness.ts
new file mode 100644
index 0000000..64dc7f1
--- /dev/null
+++ b/semana20/labook/src/business/UserBusiness.ts
@@ -0,0 +1,14 @@
+import { UserDatabase } from "../data/UserDatabase"
+import { userCredentials } from "../model/User"
+
+export class UserBusiness {
+
+  createUser = async (
+    id: string
+  ) : Promise <userCredentials | undefined> => {
+
+    const user = await new UserDatabase().createUser()
+
+    return user
+  }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/controller/PostController.ts b/semana20/labook/src/controller/PostController.ts
new file mode 100644
index 0000000..241dcc1
--- /dev/null
+++ b/semana20/labook/src/controller/PostController.ts
@@ -0,0 +1,25 @@
+import { Request, Response } from "express"
+import { PostBusiness } from "../business/PostBusiness"
+
+export class PostController {
+
+  getPostById = async (
+    req: Request,
+    res: Response
+  ) => {
+    try {
+
+      const { id } = req.params
+
+      const post = await new PostBusiness().getPostById(id)
+
+      res.send(post)
+
+    } catch (error) {
+      console.log(error)
+      res.status(500).send("Ocorreu um erro, tente novamente.")
+    }
+  }
+
+  createPost = () => { }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/controller/UserController.ts b/semana20/labook/src/controller/UserController.ts
new file mode 100644
index 0000000..0a4775a
--- /dev/null
+++ b/semana20/labook/src/controller/UserController.ts
@@ -0,0 +1,25 @@
+import { Request, Response } from "express"
+import { UserBusiness } from "../business/UserBusiness"
+
+export class PostController {
+
+  getPostById = async (
+    req: Request,
+    res: Response
+  ) => {
+    try {
+
+      const { id } = req.params
+
+      const user = await new UserBusiness().createUser(id)
+
+      res.send(user)
+
+    } catch (error) {
+      console.log(error)
+      res.status(500).send("Ocorreu um erro, tente novamente.")
+    }
+  }
+
+  createPost = () => { }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/controller/app.ts b/semana20/labook/src/controller/app.ts
new file mode 100644
index 0000000..4160873
--- /dev/null
+++ b/semana20/labook/src/controller/app.ts
@@ -0,0 +1,11 @@
+import express from "express"
+import cors from "cors"
+
+export const app = express()
+
+app.use(express.json())
+app.use(cors())
+
+app.listen(3003, () => {
+  console.log("Servidor ativo na porta 3003")
+})
\ No newline at end of file
diff --git a/semana20/labook/src/data/BaseDatabase.ts b/semana20/labook/src/data/BaseDatabase.ts
new file mode 100644
index 0000000..da7e2ef
--- /dev/null
+++ b/semana20/labook/src/data/BaseDatabase.ts
@@ -0,0 +1,19 @@
+import knex from 'knex'
+import dotenv from 'dotenv'
+
+dotenv.config()
+
+export class BaseDatabase {
+
+  protected connection = knex({
+    client: 'mysql',
+    connection: {
+      host: process.env.DB_HOST,
+      user: process.env.DB_USER,
+      password: process.env.DB_PASSWORD,
+      database: process.env.DB_SCHEMA,
+      port: 3306,
+      multipleStatements: true
+    }
+  })
+}
\ No newline at end of file
diff --git a/semana20/labook/src/data/PostDatabase.ts b/semana20/labook/src/data/PostDatabase.ts
new file mode 100644
index 0000000..3471da1
--- /dev/null
+++ b/semana20/labook/src/data/PostDatabase.ts
@@ -0,0 +1,13 @@
+import { post } from "../model/Post"
+import { BaseDatabase } from "./BaseDatabase"
+
+export class PostDatabase extends BaseDatabase {
+  getPostById = async (
+    id: string
+  ) : Promise<post | undefined> => {
+
+    const result = await this.connection("labook_posts").where({ id })
+
+    return result[0]
+  }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/data/UserDatabase.ts b/semana20/labook/src/data/UserDatabase.ts
new file mode 100644
index 0000000..8b6a5ef
--- /dev/null
+++ b/semana20/labook/src/data/UserDatabase.ts
@@ -0,0 +1,14 @@
+import { UserDatabase } from "../data/UserDatabase"
+import { user } from "../model/User"
+
+export class UserBusiness {
+
+  getPostById = async (
+    id: string
+  ) : Promise<user | undefined> => {
+
+    const user = await new UserDatabase().createUser(id)
+
+    return user
+  }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/index.ts b/semana20/labook/src/index.ts
new file mode 100644
index 0000000..1946dc0
--- /dev/null
+++ b/semana20/labook/src/index.ts
@@ -0,0 +1,9 @@
+import { app } from "./controller/app"
+import { PostController } from "./controller/PostController"
+import { UserController } from "./controller/UserController"
+
+const postController = new PostController()
+const userController = new UserController()
+
+app.post("/users", userController.createUser) // Criar usuário
+app.get("/posts/:id", postController.getPostById) // Busca um post por ID
\ No newline at end of file
diff --git a/semana20/labook/src/model/Post.ts b/semana20/labook/src/model/Post.ts
new file mode 100644
index 0000000..3abe9d9
--- /dev/null
+++ b/semana20/labook/src/model/Post.ts
@@ -0,0 +1,13 @@
+export enum POST_TYPES {
+  NORMAL = "NORMAL",
+  EVENT = "EVENT"
+}
+
+export interface post {
+  userId: string
+  id: string
+  photo: string
+  description: string
+  creationDate: Date
+  type: POST_TYPES
+}
\ No newline at end of file
diff --git a/semana20/labook/src/model/User.ts b/semana20/labook/src/model/User.ts
new file mode 100644
index 0000000..ff1098a
--- /dev/null
+++ b/semana20/labook/src/model/User.ts
@@ -0,0 +1,13 @@
+export type authenticationData = {
+  id: string
+}
+
+export type userCredentials ={
+  email: string
+  password: string
+}
+
+export interface user extends authenticationData, userCredentials{
+  name:string
+}
+
diff --git a/semana20/labook/src/services/Authenticator.ts b/semana20/labook/src/services/Authenticator.ts
new file mode 100644
index 0000000..2d55e4e
--- /dev/null
+++ b/semana20/labook/src/services/Authenticator.ts
@@ -0,0 +1,35 @@
+import { config } from "dotenv"
+import { JwtPayload, sign, verify } from "jsonwebtoken"
+import { authenticationData } from "../model/User"
+
+config()
+
+export class Authenticator {
+  
+  generateToken = (
+    payload: authenticationData
+  ) => {
+    return sign(
+      payload,
+      process.env.JWT_KEY as string,
+      {
+        expiresIn: "12h"
+      }
+    )
+  }
+
+  getTokenData = (token: string): authenticationData | null => {
+    try {
+      const tokenData = verify(
+        token,
+        process.env.JWT_KEY!
+      ) as JwtPayload
+
+      return {
+        id: tokenData.id
+      }
+    } catch (error) {
+      return null
+    }
+  }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/services/HashManager.ts b/semana20/labook/src/services/HashManager.ts
new file mode 100644
index 0000000..2c6f7a9
--- /dev/null
+++ b/semana20/labook/src/services/HashManager.ts
@@ -0,0 +1,19 @@
+import { compareSync, genSaltSync, hashSync } from "bcryptjs"
+
+export class HashManager {
+  
+  createHash = ( plainText: string) => { 
+    const salt = genSaltSync(12)
+
+    const cypherText = hashSync(plainText, salt)
+
+    return cypherText
+  }
+
+  compareHash = (
+    plainText: string,
+    cypherText: string
+  ) => {
+    return compareSync(plainText, cypherText)
+  }
+}
\ No newline at end of file
diff --git a/semana20/labook/src/services/IdGenerator.ts b/semana20/labook/src/services/IdGenerator.ts
new file mode 100644
index 0000000..0f7ab63
--- /dev/null
+++ b/semana20/labook/src/services/IdGenerator.ts
@@ -0,0 +1,5 @@
+import { v4 } from "uuid"
+
+export class IdGenerator {
+  generate = () => v4()
+}
\ No newline at end of file
diff --git a/semana20/labook/tsconfig.json b/semana20/labook/tsconfig.json
new file mode 100644
index 0000000..4de8a92
--- /dev/null
+++ b/semana20/labook/tsconfig.json
@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "esModuleInterop": true,
+    "rootDir": "./src",
+    "outDir": "./build"
+  }
+}
\ No newline at end of file