How many clients who choose statement of weekly issuance are User?
Frequency = 'POPLATEK TYDNE' refers to weekly issuance
SELECT COUNT(T2.account_id) FROM account AS T1 INNER JOIN disp AS T2 ON T2.account_id = T1.account_id WHERE T1.frequency = 'POPLATEK TYDNE' AND T2.type = 'USER'