https://www.jetbrains.com/help/youtrack/devportal/HUB-REST-API_Project-Teams_Project-Roles-of-Project-Team_Add-Project-Role-to-Project-Roles-of-a-Project-Team.html
a teamaddprojectrole
https://www.jetbrains.com/help/youtrack/devportal/HUB-REST-API_Services_Untrusted-Redirect-U-R-Is-of-Service_Get-All-Untrusted-Redirect-U-R-Is-of-a-Service.html
u rgetredirectservice
https://www.jetbrains.com/help/youtrack/server/import-from-zendesk.html
Import Zendesk tickets into YouTrack smoothly. Migrate support requests and customer data to unify your helpdesk management.
importzendeskyoutrackserverdocumentation
https://www.jetbrains.com/help/youtrack/devportal/HUB-REST-API_Organizations_Own-Users-of-Organization_Get-Own-User-from-Own-Users-of-a-Organization.html
getuserorganizationdeveloper
https://www.jetbrains.com/help/youtrack/devportal/HUB-REST-API_User-Groups_Sourced-Organization-Roles-of-User-Group_Get-All-Sourced-Organization-Roles-of-a-User-Group.html
user groupgetsourcedorganizationroles
https://www.jetbrains.com/help/youtrack/server/import-from-csv.html
Import issues from CSV files into YouTrack quickly. Map fields, transform data, and migrate your project information with ease.
importcsvyoutrackserverdocumentation