API authentication for client integrations

[nishad-ayanworks]

• [x] Organization should be able to create clientId & clientSecret.
• [x] Create POST API for clientId & clientSecret
• [x] GET API for clientId & clientSecret
• [x] POST API to get access token from clientId & clientSecret
• [x] DELETE API for clientId & clientSecret (mid sprint)

Acceptance Criteria:

• As an Owner, I should be able to create a clientId & clientSecret.
• As an admin, I should be able to create a clientId & clientSecret.
• As a user, I should get the access token from clientId & clientSecret after admin or owner provides clientId & clientSecret so from that access token I should be able to access all the APIs.
• Except an Owner and Admin others should not be able to create clientId & clientSecret.