Add `Можливість отримати доступ до договору` test case

And corresponding keyword to op_client.robot

@@ -1305,3 +1305,14 @@ Library  openprocurement_client.utils
   ${contract}=  munch_dict  arg=${contract}
   ${contract}=  munch_dict  arg=${contract}
   Log  ${contract}
   Log  ${contract}
   [return]  ${contract}
   [return]  ${contract}
+
+
+Отримати доступ до договору
+  [Arguments]  ${username}  ${contract_uaid}
+  ${internalid}=  openprocurement_client.Отримати internal id по UAid для договору  ${username}  ${contract_uaid}
+  ${contract}=  Call Method  ${USERS.users['${username}'].contracting_client}  get_contract_credentials  ${internalid}  ${USERS.users['${username}'].access_token}  ${EMPTY}
+  ${contract}=  munch_dict  arg=${contract}
+  Set To Dictionary  ${USERS.users['${username}']}  contract_data=${contract}
+  Set To Dictionary  ${USERS.users['${username}']}  contract_access_token=${contract.access.token}
+  Log  ${contract}
+  [return]  ${contract}

@@ -28,3 +28,10 @@ Suite Teardown  Test Suite Teardown
   ...      ${USERS.users['${viewer}'].broker}  ${USERS.users['${tender_owner}'].broker}
   ...      ${USERS.users['${viewer}'].broker}  ${USERS.users['${tender_owner}'].broker}
   :FOR  ${username}  IN  @{used_roles}
   :FOR  ${username}  IN  @{used_roles}
   \  Run As  ${${username}}  Пошук договору по ідентифікатору  ${CONTRACT_UAID}
   \  Run As  ${${username}}  Пошук договору по ідентифікатору  ${CONTRACT_UAID}
+
+
+Можливість отримати доступ до договору
+  [Tags]   ${USERS.users['${tender_owner}'].broker}: Отримання прав доступу до договору
+  ...      tender_owner
+  ...      ${USERS.users['${tender_owner}'].broker}
+  Run As  ${tender_owner}  Отримати доступ до договору  ${CONTRACT_UAID}