DMS| Preprod | Not able to create candidate through API for multiple company

steps:

1. Create candidate through below API
   corporate/dms/api/candidateProfile
   Email id- prateek.saxena@careerbuilder.com ( Existing candidate for CB internal Beta, user id- SAPR, Pwd- SAPR)
   UserDid: featuretestuser1
   AccountDid: CBATSFEATURETEST2
   o/p -->Candidate id 997 ( create new candidate)
2. now create same candidate
   corporate/dms/api/candidateProfile
   UserDid: ABC
   AccountDid: A7F0PT78MTMZ470WBBT
   o/p->
   "error": "Signer already exist."
3. When we login with candidate, we are not able to see company name in drop down