Initial work, copied from the Shopify provider

framework/saleor/utils/mutations/customer-activate-by-url.ts

@@ -0,0 +1,19 @@
+const customerActivateByUrlMutation = /* GraphQL */ `
+  mutation customerActivateByUrl($activationUrl: URL!, $password: String!) {
+    customerActivateByUrl(activationUrl: $activationUrl, password: $password) {
+      customer {
+        id
+      }
+      customerAccessToken {
+        accessToken
+        expiresAt
+      }
+      customerUserErrors {
+        code
+        field
+        message
+      }
+    }
+  }
+`
+export default customerActivateByUrlMutation