feat: HelloAsso payment

src/main/java/fr/titionfire/ffsaf/rest/client/HelloAssoAuthClient.java

@@ -0,0 +1,32 @@
+package fr.titionfire.ffsaf.rest.client;
+
+import fr.titionfire.ffsaf.rest.client.dto.TokenResponse;
+import io.smallrye.mutiny.Uni;
+import jakarta.ws.rs.*;
+import jakarta.ws.rs.core.MediaType;
+import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;
+
+@Path("/")
+@RegisterRestClient(configKey = "helloasso-auth")
+public interface HelloAssoAuthClient {
+
+    @POST
+    @Path("/token")
+    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
+    @Produces(MediaType.APPLICATION_JSON)
+    Uni<TokenResponse> getToken(
+            @FormParam("grant_type") String grantType,
+            @FormParam("client_id") String clientId,
+            @FormParam("client_secret") String clientSecret
+    );
+
+    @POST
+    @Path("/token")
+    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
+    @Produces(MediaType.APPLICATION_JSON)
+    Uni<TokenResponse> refreshToken(
+            @FormParam("grant_type") String grantType,
+            @FormParam("client_id") String clientId,
+            @FormParam("refresh_token") String refreshToken
+    );
+}