expo whoami

Check your current Expo authentication status.

The expo whoami command displays the username of the currently authenticated Expo account, or indicates if you’re not logged in.

Usage

npx expo whoami

What It Shows

The command displays:

• Your Expo username (if logged in)
• A message indicating you’re not logged in (if not authenticated)

Examples

Check Login Status

npx expo whoami

When logged in:

myusername

When not logged in:

Not logged in

Use in Scripts

Check authentication in shell scripts:

#!/bin/bash

USER=$(npx expo whoami 2>/dev/null)

if [ "$USER" = "Not logged in" ]; then
  echo "Please log in first"
  npx expo login
  exit 1
fi

echo "Logged in as: $USER"

CI/CD Verification

Verify authentication before building:

# GitHub Actions example
- name: Check Expo authentication
  run: |
    if npx expo whoami | grep -q "Not logged in"; then
      echo "Not authenticated with Expo"
      exit 1
    fi

Common Use Cases

Verify Login

After running expo login, confirm success:

npx expo login
npx expo whoami

Switch Accounts

Check which account is active when switching:

# Current account
npx expo whoami

# Logout
npx expo logout

# Login with different account
npx expo login

# Verify new account
npx expo whoami

Team Collaboration

Confirm you’re using the correct account:

npx expo whoami
# Ensure it shows your team account

CI/CD Debugging

Troubleshoot authentication issues in CI:

# Check if EXPO_TOKEN is working
npx expo whoami

Exit Codes

The command returns:

• 0 - Success (logged in or not)
• Non-zero - Error occurred

Checking in Scripts

if npx expo whoami > /dev/null 2>&1; then
  echo "Authentication check successful"
else
  echo "Authentication check failed"
  exit 1
fi

Authentication Methods

Interactive Login

npx expo login
npx expo whoami

Access Token

Using environment variable:

export EXPO_TOKEN=your-access-token
npx expo whoami

Browser Login

npx expo login --browser
npx expo whoami

Output Format

The command outputs:

• Plain text username
• No additional formatting
• Suitable for parsing in scripts

Example Output

$ npx expo whoami
myusername

Troubleshooting

”Not logged in” When You Should Be

If you expect to be logged in but see “Not logged in”:

1. Check credentials storage:

   # macOS: Check Keychain
   # Linux: Check ~/.expo
   # Windows: Check Credential Manager
   

2. Try logging in again:

   npx expo logout
   npx expo login
   

3. Verify access token:

   echo $EXPO_TOKEN
   # Should show your token if set
   

4. Check token validity:

   • Tokens may expire
   • Revoked tokens don’t work
   • Generate new token at: https://expo.dev/settings/access-tokens

Network Errors

If the command fails with network error:

npx expo whoami
# Error: Network request failed

Solutions:

• Check internet connection
• Verify Expo services status: https://status.expo.dev
• Check firewall/proxy settings
• Try again after a moment

Permission Errors

If you get permission errors:

# Linux/macOS: Check ~/.expo permissions
ls -la ~/.expo

# Fix permissions if needed
chmod 700 ~/.expo

CI/CD Usage

GitHub Actions

name: Build

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      
      - name: Setup Expo
        env:
          EXPO_TOKEN: ${{ secrets.EXPO_TOKEN }}
        run: |
          npm install -g expo-cli
          npx expo whoami

GitLab CI

build:
  script:
    - export EXPO_TOKEN=$EXPO_ACCESS_TOKEN
    - npx expo whoami
    - npx eas build --platform android

Travis CI

script:
  - npx expo whoami
  - npx eas build

Comparison with Other Commands

Command	Purpose	Output
expo whoami	Check current user	Username or “Not logged in”
expo login	Authenticate	Login prompt
expo logout	Sign out	Confirmation message
expo register	Create account	Registration prompt

Programmatic Usage

Node.js Script

const { exec } = require('child_process');

exec('npx expo whoami', (error, stdout, stderr) => {
  if (error) {
    console.error(`Error: ${error.message}`);
    return;
  }
  
  const username = stdout.trim();
  if (username === 'Not logged in') {
    console.log('Please log in to continue');
  } else {
    console.log(`Logged in as: ${username}`);
  }
});

Python Script

import subprocess

result = subprocess.run(
    ['npx', 'expo', 'whoami'],
    capture_output=True,
    text=True
)

username = result.stdout.strip()
if username == 'Not logged in':
    print('Please log in to continue')
else:
    print(f'Logged in as: {username}')

Security Considerations

Safe to Run

The expo whoami command:

• Only displays your username
• Doesn’t expose sensitive information
• Doesn’t modify any data
• Safe to run in any environment

No Credentials Exposed

The command doesn’t reveal:

• Your password
• Access tokens
• Email address (unless it’s your username)
• Account details

Best Practices

Verify Before Operations

Check authentication before critical operations:

#!/bin/bash

# Verify login
if ! npx expo whoami > /dev/null 2>&1; then
  echo "Not logged in. Please authenticate first."
  exit 1
fi

# Proceed with build
npx eas build --platform all

Log in CI/CD

Log authentication status in CI logs:

- name: Check authentication
  run: |
    echo "Current user:"
    npx expo whoami

Team Workflows

Document expected account in team workflows:

# Check you're using team account
CURRENT_USER=$(npx expo whoami)
EXPECTED_USER="team-account"

if [ "$CURRENT_USER" != "$EXPECTED_USER" ]; then
  echo "Warning: Expected $EXPECTED_USER but got $CURRENT_USER"
fi

Related Commands

• expo login - Authenticate with Expo
• expo logout - Sign out of your account
• expo register - Create a new account

Quick Reference

# Check who is logged in
npx expo whoami

# If not logged in
npx expo login

# Logout
npx expo logout

# Login with different account
npx expo logout && npx expo login