How to set SendClaimsIn for azure ad b2c REST call - azure

Question

I have created an AAD B2C custom policy which makes a call to call our REST API when a new user signs up by creating a custom Azure AD B2C custom policy.But i have to set two values to REST API. Ocp-Apim-Subscription-Key in header and email id in body.but i have to set SendClaimsIn only as either header or body.
so i added SendClaimsIn as header.But i cdont know how to set both values as inputclaim.My code is
<ClaimsProvider>
<DisplayName>Signup REST APIs</DisplayName>
<TechnicalProfiles>
<TechnicalProfile Id="REST-ValidateProfile">
<DisplayName>Check loyaltyId Azure Function web hook</DisplayName>
<Protocol Name="Proprietary" Handler="Web.TPEngine.Providers.RestfulProvider, Web.TPEngine, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
<Metadata>
<Item Key="ServiceUrl">https://myapicall.io/api/</Item>
<Item Key="SendClaimsIn">Header</Item>
<Item Key="AuthenticationType">Bearer</Item>
<Item Key="AllowInsecureAuthInProduction">false</Item>
</Metadata>
<CryptographicKeys>
<Key Id="BearerAuthenticationToken" StorageReferenceId="B2C_1A_RestApiBearerToken" />
</CryptographicKeys>
<InputClaims>
<!-- Claims sent to your REST API -->
<InputClaim ClaimTypeReferenceId="email" />
<InputClaim ClaimTypeReferenceId="grant_type" "DefaultValue"="Ocp-Apim-Subscription-Key"/>
</InputClaims>
<UseTechnicalProfileForSessionManagement ReferenceId="SM-Noop" />
</TechnicalProfile>
</TechnicalProfiles>
</ClaimsProvider>
its shows validation error while uploading
makes a reference to ClaimType with id "Ocp-Apim-Subscription-Key" but
neither the policy nor any of its base policies contain such an
element
i want to set header as Ocp-Apim-Subscription-Key as "12345"

Answer 1

Add the following inside of the <ClaimsSchema> tag near the top of the file:
<ClaimType Id="Ocp-Apim-Subscription-Key">
<DisplayName>OCP APIM Subscription Key</DisplayName>
<DataType>string</DataType>
</ClaimType>
Change the values inside of the <InputClaims> in your REST-ValidateProfile technical profile to the following:
<InputClaims>
<!-- Claims sent to your REST API -->
<InputClaim ClaimTypeReferenceId="email" />
<InputClaim ClaimTypeReferenceId="Ocp-Apim-Subscription-Key" DefaultValue="12345" />
</InputClaims>
You don't need a grant_type input claim for a static OAuth2 bearer (see here).