feat: Implement medusa payments provider (#13772)

* feat: Implement medusa payments provider

* chore: Improvements after testing

* chore: Add typings to medusa payments

* fix: Final changes to complete medusa payment provider

* update package

* fix: Final changes to complete medusa payment provider

---------

Co-authored-by: adrien2p <adrien.deperetti@gmail.com>
Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/modules/payment/src/services/payment-provider.ts

@@ -5,6 +5,8 @@ import {
   CancelPaymentOutput,
   CapturePaymentInput,
   CapturePaymentOutput,
+  RetrieveAccountHolderInput,
+  RetrieveAccountHolderOutput,
   CreateAccountHolderInput,
   CreateAccountHolderOutput,
   DAL,
@@ -140,6 +142,21 @@ Please make sure that the provider is registered in the container and it is conf
     return await provider.refundPayment(input)
   }
 
+  async retrieveAccountHolder(
+    providerId: string,
+    input: RetrieveAccountHolderInput
+  ): Promise<RetrieveAccountHolderOutput> {
+    const provider = this.retrieveProvider(providerId)
+    if (!provider.retrieveAccountHolder) {
+      this.#logger.warn(
+        `Provider ${providerId} does not support retrieving account holders`
+      )
+      return {} as unknown as RetrieveAccountHolderOutput
+    }
+
+    return await provider.retrieveAccountHolder(input)
+  }
+
   async createAccountHolder(
     providerId: string,
     input: CreateAccountHolderInput