medusa-store/www/apps/resources/app/commerce-modules/auth/examples/page.mdx

import { CodeTabs, CodeTab } from "docs-ui"

export const metadata = {
  title: `Examples of the Auth Module`,
}

# {metadata.title}

In this guide, you’ll find common examples of how you can use the Auth Module in your application.

## Authenticate User

<Note>

This example uses the [jsonwebtoken NPM package](https://www.npmjs.com/package/jsonwebtoken) to create the authentication token.

</Note>

<CodeTabs groupId="app-type">
  <CodeTab label="Medusa API Router" value="medusa">

  ```ts collapsibleLines="1-10" expandButtonLabel="Show Imports"
  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
  import {
    IAuthModuleService,
    AuthenticationInput,
  } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/utils"
  import { MedusaError } from "@medusajs/utils"
  import jwt from "jsonwebtoken"

export async function POST(
  req: MedusaRequest,
  res: MedusaResponse
): Promise<void> {
  const authModuleService: IAuthModuleService = req.scope.resolve(
    ModuleRegistrationName.AUTH
  )

  const { success, authIdentity, location, error } =
    await authModuleService.authenticate("emailpass", {
      url: req.url,
      headers: req.headers,
      query: req.query,
      body: req.body,
      authScope: "admin",
      protocol: req.protocol,
    } as AuthenticationInput)

  if (!success) {
    throw new MedusaError(MedusaError.Types.UNAUTHORIZED, error)
  }

  if (location) {
    res.redirect(location)
    return
  }

  const { jwtSecret } = req.scope.resolve("configModule").projectConfig.http
  const token = jwt.sign(authIdentity, jwtSecret)

  res.status(200).json({ token })
}
```

  </CodeTab>
  <CodeTab label="Next.js App Router" value="nextjs">

```ts
import { NextResponse } from "next/server"

import { initialize as initializeAuthModule } from "@medusajs/auth"

export async function POST(request: Request) {
  const authModuleService = await initializeAuthModule()
  const url = new URL(request.url)

  const { success, authIdentity, location, error } =
    await authModuleService.authenticate("emailpass", {
      url: request.url,
      headers: Object.fromEntries(request.headers),
      query: Object.fromEntries(url.searchParams),
      body: await request.json(),
      authScope: "admin",
      protocol: url.protocol,
    } as AuthenticationInput)

  if (!success) {
    throw new Error(error)
  }

  if (location) {
    return NextResponse.redirect(location)
    return
  }

  const token = jwt.sign(authIdentity, "supersecret")

  return NextResponse.json(
    {
      token,
    },
    {
      status: 200,
    }
  )
}
```

  </CodeTab>
</CodeTabs>

---

## Validate Callback

<Note>

This example uses the [jsonwebtoken NPM package](https://www.npmjs.com/package/jsonwebtoken) to create the authentication token.

</Note>

<CodeTabs groupId="app-type">
  <CodeTab label="Medusa API Router" value="medusa">

  ```ts collapsibleLines="1-10" expandButtonLabel="Show Imports"
  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
  import {
    IAuthModuleService,
    AuthenticationInput,
  } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/utils"
  import { MedusaError } from "@medusajs/utils"
  import jwt from "jsonwebtoken"

export async function POST(
  req: MedusaRequest,
  res: MedusaResponse
): Promise<void> {
  const authModuleService: IAuthModuleService = req.scope.resolve(
    ModuleRegistrationName.AUTH
  )

  const { success, authIdentity, error, successRedirectUrl } =
    await authModuleService.validateCallback("google", {
      url: req.url,
      headers: req.headers,
      query: req.query,
      body: req.body,
      authScope: "admin",
      protocol: req.protocol,
    } as AuthenticationInput)

  if (!success) {
    throw new MedusaError(MedusaError.Types.UNAUTHORIZED, error)
  }

  const { jwtSecret } = req.scope.resolve("configModule").projectConfig.http
  const token = jwt.sign(authIdentity, jwtSecret)

  if (successRedirectUrl) {
    const url = new URL(successRedirectUrl!)
    url.searchParams.append("auth_token", token)

    return res.redirect(url.toString())
  }

  res.status(200).json({ token })
}
```

  </CodeTab>
  <CodeTab label="Next.js App Router" value="nextjs">

```ts collapsibleLines="1-7" expandButtonLabel="Show Imports"
import { NextResponse } from "next/server"

import { initialize as initializeAuthModule } from "@medusajs/auth"

export async function POST(request: Request) {
  const authModuleService = await initializeAuthModule()
  const url = new URL(request.url)

  const { success, authIdentity, location, error } =
    await authModuleService.authenticate("google", {
      url: request.url,
      headers: Object.fromEntries(request.headers),
      query: Object.fromEntries(url.searchParams),
      body: await request.json(),
      authScope: "admin",
      protocol: url.protocol,
    } as AuthenticationInput)

  if (!success) {
    throw new Error(error)
  }

  const token = jwt.sign(authIdentity, "supersecret")

  if (successRedirectUrl) {
    const url = new URL(successRedirectUrl!)
    url.searchParams.append("auth_token", token)

    return NextResponse.redirect(url.toString())
  }

  return NextResponse.json(
    {
      token,
    },
    {
      status: 200,
    }
  )
}
```

  </CodeTab>
</CodeTabs>

---

## Create Auth Identity

<CodeTabs groupId="app-type">
  <CodeTab label="Medusa API Router" value="medusa">

  ```ts
  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
  import { IAuthModuleService } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/utils"

export async function POST(
  req: MedusaRequest,
  res: MedusaResponse
): Promise<void> {
  const authModuleService: IAuthModuleService = req.scope.resolve(
    ModuleRegistrationName.AUTH
  )

  const authIdentity = await authModuleService.createAuthIdentities({
    provider: "emailpass",
    entity_id: "user@example.com",
    scope: "admin",
  })

  res.json({ auth_identity: authIdentity })
}
```

  </CodeTab>
  <CodeTab label="Next.js App Router" value="nextjs">

```ts
import { NextResponse } from "next/server"

import { initialize as initializeAuthModule } from "@medusajs/auth"

export async function POST(request: Request) {
  const authModuleService = await initializeAuthModule()

  const authIdentity = await authModuleService.createAuthIdentities({
    provider: "emailpass",
    entity_id: "user@example.com",
    scope: "admin",
  })

  return NextResponse.json({
    auth_identity: authIdentity,
  })
}
```

  </CodeTab>
</CodeTabs>

---

## List Auth Identities

<CodeTabs groupId="app-type">
  <CodeTab label="Medusa API Router" value="medusa">

  ```ts
  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
  import { IAuthModuleService } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/utils"

export async function GET(
  req: MedusaRequest,
  res: MedusaResponse
): Promise<void> {
  const authModuleService: IAuthModuleService = req.scope.resolve(
    ModuleRegistrationName.AUTH
  )

  res.json({
    auth_identitys: await authModuleService.listAuthIdentities(),
  })
}
```

  </CodeTab>
  <CodeTab label="Next.js App Router" value="nextjs">

```ts
import { NextResponse } from "next/server"

import { initialize as initializeAuthModule } from "@medusajs/auth"

export async function GET(request: Request) {
  const authModuleService = await initializeAuthModule()

  return NextResponse.json({
    auth_identities: await authModuleService.listAuthIdentities(),
  })
}
```

  </CodeTab>
</CodeTabs>

---

## Update an Auth Identity

<CodeTabs groupId="app-type">
  <CodeTab label="Medusa API Router" value="medusa">

  ```ts
  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
  import { IAuthModuleService } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/utils"

export async function POST(
  req: MedusaRequest,
  res: MedusaResponse
): Promise<void> {
  const authModuleService: IAuthModuleService = req.scope.resolve(
    ModuleRegistrationName.AUTH
  )

  const authIdentity = await authModuleService.updateAuthIdentites({
    id: "authusr_123",
    provider_metadata: {
      test: true,
    },
  })

  res.json({
    auth_identity: authIdentity,
  })
}
```

  </CodeTab>
  <CodeTab label="Next.js App Router" value="nextjs">

```ts
import { NextResponse } from "next/server"

import { initialize as initializeAuthModule } from "@medusajs/auth"

type ContextType = {
  params: {
    id: string
  }
}

export async function POST(request: Request, { params }: ContextType) {
  const authModuleService = await initializeAuthModule()

  const authIdentity = await authModuleService.updateAuthIdentites({
    id: "authusr_123",
    provider_metadata: {
      test: true,
    },
  })

  return NextResponse.json({
    auth_identity: authIdentity,
  })
}
```

  </CodeTab>
</CodeTabs>

---

## Delete an Auth Identity

<CodeTabs groupId="app-type">
  <CodeTab label="Medusa API Router" value="medusa">

  ```ts
  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
  import { IAuthModuleService } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/utils"

export async function DELETE(
  req: MedusaRequest,
  res: MedusaResponse
): Promise<void> {
  const authModuleService: IAuthModuleService = req.scope.resolve(
    ModuleRegistrationName.AUTH
  )

  await authModuleService.deleteAuthIdentities(["authusr_123"])

  res.status(200)
}
```

  </CodeTab>
  <CodeTab label="Next.js App Router" value="nextjs">

```ts
import { NextResponse } from "next/server"

import { initialize as initializeAuthModule } from "@medusajs/auth"

type ContextType = {
  params: {
    id: string
  }
}

export async function DELETE(request: Request, { params }: ContextType) {
  const authModuleService = await initializeAuthModule()

  await authModuleService.deleteAuthIdentities(["authusr_123"])
}
```

  </CodeTab>
</CodeTabs>

---

## More Examples

The [Auth Module's main service reference](/references/auth) provides a reference to all the methods available for use with examples for each.