What is Deutsche Telekom's accreditation type?
CREATE TABLE "ecosystem_operators_mobile_phone_and_cli" (
  "company_name" text,
  "network_brand_name" text,
  "country" text,
  "accreditation_type" text,
  "accreditation_level" text,
  "date" text
);
SELECT "accreditation_type" FROM "ecosystem_operators_mobile_phone_and_cli" WHERE "network_brand_name"='deutsche telekom';