Step 1. Firstly follow this link https://developer.twitter.com/ and sign in.
Step 2. Click “Apply” in the right top corner.
Step 3. Then apply for a developer account.
Step 4. And verify the identity. Choose User profile, click “Continue“.
Choose access for organization and fill in all the necessary details.
Accept the terms of service.
Check your email inbox to confirm your email address.
Twitter team will get in touch with you shortly.
Step 5. Once your developer’s account has been approved, create a new Twitter app by clicking the “Create New App” button.
Then fill out the needed account details. Click “Create”.