PLT-4535/PLT-4503 Fix inactive users in searches and add option functionality to DB user search (#4413)

* Add options to user database search

* Fix inactive users showing up incorrectly in some user searches

* Read JSON for searchUsers API into anonymous struct

* Move anonymous struct to be a normal struct in model directory and upadte client to use it

* Added clarification comment about slightly odd query condition in search

model/client.go

@@ -572,10 +572,8 @@ func (c *Client) GetProfilesByIds(userIds []string) (*Result, *AppError) {
 
 // SearchUsers returns a list of users that have a username matching or similar to the search term. Must
 // be authenticated.
-func (c *Client) SearchUsers(term string, teamId string, options map[string]string) (*Result, *AppError) {
-	options["term"] = term
-	options["team_id"] = teamId
-	if r, err := c.DoApiPost("/users/search", MapToJson(options)); err != nil {
+func (c *Client) SearchUsers(params UserSearch) (*Result, *AppError) {
+	if r, err := c.DoApiPost("/users/search", params.ToJson()); err != nil {
 		return nil, err
 	} else {
 		defer closeBody(r)