Thanks for the suggestion, will try implementing the same.
"ClaimsMapping": [
{
"claim": "unique_name",
"key": "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name"
}
]
Adding above to appsettings.json (Inside OpenId) solved the <span class="colour" style="color: rgb(51, 51, 51);">[Problem #2]</span>