Sendgrid Ruby API, Trying to send over Header content in post request - ruby-on-rails

Question

I am trying to send over a Post request to sendgrid to generate an API key for a subuser.
This is what my code currently looks like
body = JSON.parse('{
"name":"My API Key",
"scopes": [
"mail.send",
"alerts.create",
"alerts.read"
]
}')
header = {'On-Behalf-Of' => 'my#email.com'}
sg = SendGrid::API.new(api_key: ENV['SENDGRID_API_KEY'])
response = sg.client.api_keys.post(request_body: body, request_header: header)
This code generates the API but on the main account instead of the Subuser account. The header is what drives where the API key is generated and I can seem to find any sources online that how the correct syntax for sending over the header to sendgrid.
If you could please help I would really appreciate it. Thanks!

Answer 1

I recently had to do this. You need to set the On-Behalf-Of headers when you instantiate the client not when you make the request:
```
#send_grid = API.new(api_key: #api_key, request_headers: {
'On-Behalf-Of' => #username
})
```
Then when you make a request with #send_grid it will send on behalf of the subuser -- and the API key will not show up in the list of api keys on the parent account

Answer 2

If I understand correct, you want to send email "From" another user. On Behalf of is non standard way of doing things.
For eg. https://sendgrid.com/docs/Classroom/Troubleshooting/Authentication/my_emails_are_displaying_as_on_behalf_of_or_via_in_some_mail_clients.html
You may want to try setting from instead of on-behalf-of
"from": {
"email": "from_address#example.com"
},
Refer to: https://sendgrid.com/docs/API_Reference/Web_API_v3/Mail/index.html