Add terms of use acceptance to connect account creation

[begedin]

Problem

We need changes in the API accommodating client changes for issue code-corps/code-corps-ember#925

The create action should take legal_entity_tos_acceptance_date, combine it with legal_entity_tos_acceptance_ip and legal_entity_tos_acceptance_user_agent, which are extracted from Plug.Conn{}, then pass that into account creation

Subtasks

• Extract IP address
• Extract user agent
• Merge with existing create attributes before passing into account service.

References

code-corps/code-corps-ember#925