Class payload

include/jwt-cpp/jwt.h:2799–2910

	 */
	template<typename json_traits>
	class payload {
	protected:
		details::map_of_claims<json_traits> payload_claims;

	public:
		using basic_claim_t = basic_claim<json_traits>;

		/**
		 * Check if issuer is present ("iss")
		 * \return true if present, false otherwise
		 */
		bool has_issuer() const noexcept { return has_payload_claim("iss"); }
		/**
		 * Check if subject is present ("sub")
		 * \return true if present, false otherwise
		 */
		bool has_subject() const noexcept { return has_payload_claim("sub"); }
		/**
		 * Check if audience is present ("aud")
		 * \return true if present, false otherwise
		 */
		bool has_audience() const noexcept { return has_payload_claim("aud"); }
		/**
		 * Check if expires is present ("exp")
		 * \return true if present, false otherwise
		 */
		bool has_expires_at() const noexcept { return has_payload_claim("exp"); }
		/**
		 * Check if not before is present ("nbf")
		 * \return true if present, false otherwise
		 */
		bool has_not_before() const noexcept { return has_payload_claim("nbf"); }
		/**
		 * Check if issued at is present ("iat")
		 * \return true if present, false otherwise
		 */
		bool has_issued_at() const noexcept { return has_payload_claim("iat"); }
		/**
		 * Check if token id is present ("jti")
		 * \return true if present, false otherwise
		 */
		bool has_id() const noexcept { return has_payload_claim("jti"); }
		/**
		 * Get issuer claim
		 * \return issuer as string
		 * \throw std::runtime_error If claim was not present
		 * \throw std::bad_cast Claim was present but not a string (Should not happen in a valid token)
		 */
		typename json_traits::string_type get_issuer() const { return get_payload_claim("iss").as_string(); }
		/**
		 * Get subject claim
		 * \return subject as string
		 * \throw std::runtime_error If claim was not present
		 * \throw std::bad_cast Claim was present but not a string (Should not happen in a valid token)
		 */
		typename json_traits::string_type get_subject() const { return get_payload_claim("sub").as_string(); }
		/**
		 * Get audience claim