Create Google application
1. Goto https://www.google.com, and press 'Sign In' button.
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3. Enter your password and click 'Next'.
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4. Goto https://console.developers.google.com/projectselector/apis/dashboard, and click 'Create' button.
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5. After redirecting to the new page, input your project name and your organization data. Click 'CREATE' button.
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6. Wait until your project is created. You could check for the status of creation in notifications
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7. Once your application is ready, click on dropdown(1), chose your organization(2) and project you have created(3).
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8. Go to dashboard and click on 'ENABLE API AND SERVICES'.
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9. Search for API you want to use and enable it.
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10. Click on credentials on the left menu.
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11. Open 'OAuth consent screen' tab, input all of the information about your application.
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12. Add oauth.io to an authorized domain.
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13. Open Credentials tab, click 'Create credentials' and choose OAuth client ID.
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14. Chose 'Web application' option, add https://oauth.io to an Authorized JavaScript origins and https://oauth.io/auth to an Authorized redirect URIs.
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15. After clicking 'Create' button, your application credentials will be shown.
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