Use post.

apps/services/auth/ids-api/src/app/delegations/delegation-verification.dto.ts

@@ -0,0 +1,14 @@
+import { ApiProperty } from '@nestjs/swagger'
+import { Type } from 'class-transformer'
+import { IsArray, IsString } from 'class-validator'
+
+export class DelegationVerification {
+  @IsString()
+  @ApiProperty()
+  fromNationalId!: string
+
+  @IsArray()
+  @Type(() => String)
+  @ApiProperty({ type: [String] })
+  delegationTypes!: string[]
+}

apps/services/auth/ids-api/src/app/delegations/delegations.controller.ts

@@ -1,9 +1,10 @@
 import {
+  Body,
   Controller,
   Get,
-  Headers,
   Inject,
   ParseArrayPipe,
+  Post,
   Query,
   UseGuards,
   Version,
@@ -29,6 +30,7 @@ import { LOGGER_PROVIDER } from '@island.is/logging'
 import { AuthDelegationType } from '@island.is/shared/types'
 
 import { DelegationVerificationResult } from './delegation-verification-result.dto'
+import { DelegationVerification } from './delegation-verification.dto'
 
 import type { Logger } from '@island.is/logging'
 import type { User } from '@island.is/auth-nest-tools'
@@ -115,22 +117,18 @@ export class DelegationsController {
   }
 
   @Scopes('@identityserver.api/authentication')
-  @Get('verify')
+  @Post('verify')
   @ApiOkResponse({ type: DelegationVerificationResult })
   async verify(
     @CurrentUser() user: User,
-    @Headers('X-Query-From-National-Id')
-    fromNationalId: string,
-    @Query('delegationType')
-    delegationType: AuthDelegationType[],
+    @Body()
+    request: DelegationVerification,
   ): Promise<DelegationVerificationResult> {
-    if (!Array.isArray(delegationType)) delegationType = [delegationType]
-
     const verified =
       await this.delegationsIncomingService.verifyDelegationAtProvider(
         user,
-        fromNationalId,
-        delegationType,
+        request.fromNationalId,
+        request.delegationTypes as AuthDelegationType[],
       )
 
     return { verified }