Configuration: NGO-specific key setup

[PritamSGB]

Is your feature request related to a problem?
There is currently no way to configure NGO-specific keys alongside the T4D key. This is important to ensure that credits or costs are accurately attributed to the respective NGO.

Describe the solution you'd like

• Implement NGO-specific key configuration.
• Allow the selection of either NGO key or T4D key for operations.

Original issue

Requirement: Ability to configure NGO specific key, besides T4D key.
This will ensure credits or cost gets incurred from respective NGO.