Easy way to manually reset a user's password in .net core identity

UpdateUserPassword.cshtml

@page
@model Demo.Pages.Users.UpdateUserPasswordModel
@{
}

<section class="section">
	<div class="container">
		<h1 class="is-headline">Update User Password</h1>

		<form method="post">
			<div asp-validation-summary="All">
				<span>Please correct the following errors:</span>
			</div>
			<div class="field">
				<label class="label">Email</label>
				<div class="control">
					<input class="input" asp-for="Input.Email" />
				</div>
			</div>

			<div class="field">
				<label class="label">New Password <span class="has-tooltip-multiline" data-tooltip="Password must be minimum 8 characters and contain at least 1 digit, 1 lowercase, 1 uppercase, and 1 non-alphanumeric (special character) "><i class="fas fa-info-circle"></i></span></label>
				<div class="control">
					<input class="input" asp-for="Input.Password" />
				</div>
			</div>

			<div class="field">
				<label class="label">Confirm Password</label>
				<div class="control">
					<input class="input" asp-for="Input.ConfirmPassword" />
				</div>
			</div>

			<div class="field">
				<div class="control">
					<button class="button is-green is-large">Submit</button>
				</div>
			</div>
		</form>
	</div>
</section>

UpdateUserPassword.cshtml.cs

using Demo.Models;

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;

using System;
using System.ComponentModel.DataAnnotations;
using System.Threading.Tasks;

namespace Demo.Pages.Users
{
	[Authorize(Roles = "Admin")]
	public class UpdateUserPasswordModel : PageModel
	{
		private readonly UserManager<AppUser> _userManager;

		[BindProperty]
		public InputModel Input { get; set; }

		public UpdateUserPasswordModel(UserManager<AppUser> userManager)
		{
			_userManager = userManager;
		}

		public void OnGet()
		{
		}

		public async Task<IActionResult> OnPostAsync()
		{
			if (!ModelState.IsValid)
			{
				return Page();
			}

			var user = await _userManager.FindByNameAsync(Input.Email);

			if (user == null)
			{
				ModelState.AddModelError(string.Empty, "No user with that phone number exists.");
				return Page();
			}

			foreach (var validator in _userManager.PasswordValidators)
			{
				var outcome = await validator.ValidateAsync(_userManager, null, Input.Password);

				if (!outcome.Succeeded)
				{
					foreach (var error in outcome.Errors)
					{
						ModelState.AddModelError(string.Empty, error.Description);
					}
				}
			}

			if (!ModelState.IsValid)
			{
				return Page();
			}

			var result = await HardResetPasswordAsync(Input.Email, Input.Password);
			if (result.Succeeded)
			{
				user.LastPasswordChangedDate = DateTime.UtcNow;
				await _userManager.UpdateAsync(user);
				return Redirect("/Identity/Account/ResetPasswordConfirmation");
			}

			foreach (var error in result.Errors)
			{
				ModelState.AddModelError(string.Empty, error.Description);
			}
			return Page();
		}

		#region password reset

		public async Task<IdentityResult> HardResetPasswordAsync(string email, string newPassword)
		{
			var user = await _userManager.FindByNameAsync(email);
			return await ChangeUserPasswordAsync(user, newPassword);
		}

		private async Task<string> GeneratePasswordResetToken(AppUser user)
		{
			return await _userManager.GeneratePasswordResetTokenAsync(user);
		}

		private async Task<IdentityResult> ChangeUserPasswordAsync(AppUser user, string newPassword)
		{
			var token = await GeneratePasswordResetToken(user);
			return await _userManager.ResetPasswordAsync(user, token, newPassword);
		}

		#endregion password reset

		public class InputModel
		{
			[Required]
			[EmailAddress]
			[Display(Name = "Email Address")]
			public string Email { get; set; }

			[Required]
			[StringLength(100, ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.", MinimumLength = 8)]
			//[DataType(DataType.Password)]
			[Display(Name = "New Password")]
			public string Password { get; set; }

			//[DataType(DataType.Password)]
			[Display(Name = "Confirm New Password")]
			[Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
			public string ConfirmPassword { get; set; }
		}
	}
}