Proxy credentials

Number of APIs: 4

1. Create a proxy credential POST https://{{host}}/etp-config/v3/configs/:configId/proxy-credentials

2. List proxy credential details GET https://{{host}}/etp-config/v3/configs/:configId/proxy-credentials/:userName

3. List proxy credentials GET https://{{host}}/etp-config/v3/configs/:configId/proxy-credentials

4. Remove a proxy credential DELETE https://{{host}}/etp-config/v3/configs/:configId/proxy-credentials/:userName