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  4. Unable to resolve service for type 'Microsoft.AspNetCore.Identity.RoleManager`1[Microsoft.AspNetCore.Identity.IdentityRole]' while attempting to activate 'PathApp.Controllers.SearchPathController'.

Unable to resolve service for type 'Microsoft.AspNetCore.Identity.RoleManager`1[Microsoft.AspNetCore.Identity.IdentityRole]' while attempting to activate 'PathApp.Controllers.SearchPathController'.

Code Example - Unable to resolve service for type 'Microsoft.AspNetCore.Identity.RoleManager`1[Microsoft.AspNetCore.Identity.IdentityRole]' while attempting to activate 'PathApp.Controllers.SearchPathController'.
                
                        services.AddDefaultIdentity<ApplicationUser().AddRoles<IdentityRole>().AddEntityFrameworkStores<ApplicationDbContext>();