Every observer id that appears on a visit, sample or observation.
observer is NA when that id is missing from the user table.
Arguments
- x
Path to a project SQLite export, or a project obs_df.
- protocol
Protocol id or name. When set, counts are restricted to that protocol's visits.
Examples
if (FALSE) { # \dontrun{
obs_users("project-export.sqlite")
obs_visits(db, user = 101)
} # }