MM-41211: Replaces SessionLength*InDays with SessionLength*InHours. (#19838)

* MM-41211: Replaces SessionLength[Web|Mobile|SSO]InDays with SessionLength[Web|Mobile|SSO]InHours.

* MM-41211: Clear the value of the old config settings.

model/access.go

@@ -24,12 +24,12 @@ type AccessData struct {
 }
 
 type AccessResponse struct {
-	AccessToken  string `json:"access_token"`
-	TokenType    string `json:"token_type"`
-	ExpiresIn    int32  `json:"expires_in"`
-	Scope        string `json:"scope"`
-	RefreshToken string `json:"refresh_token"`
-	IdToken      string `json:"id_token"`
+	AccessToken      string `json:"access_token"`
+	TokenType        string `json:"token_type"`
+	ExpiresInSeconds int32  `json:"expires_in"`
+	Scope            string `json:"scope"`
+	RefreshToken     string `json:"refresh_token"`
+	IdToken          string `json:"id_token"`
 }
 
 // IsValid validates the AccessData and returns an error if it isn't configured