Invites workflows-Embedded sending DG

Number of APIs: 5

1. 1. Authentication POST {{url}}/oauth2/token

2. 2. Upload doc POST {{url}}/document

3. 3. Add field to doc PUT {{url}}/document/{{document_id}}

4. 4. Create doc group POST {{url}}/documentgroup

5. 5. Create emb sending DG link POST {{url}}/v2/document-groups/{{document_group_id}}/embedded-sending