Unity Build Settings (Keystore, Alias Password) Quick Load Window Script. Put this in Editor Folder.

BuildHelper.cs

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEditor.Build.Content;
using UnityEngine;
using UnityEngine.Serialization;

public class BuildHelper : EditorWindow
{
    [System.Serializable]
    public class BuildSetting
    {
        public string version;
        public int versionCode;

        public string keystorePath;
        public string keystorePassword;

        public string aliasName;
        public string aliasPassword;

        public BuildSetting()
        {
            version = PlayerSettings.bundleVersion;
            versionCode = PlayerSettings.Android.bundleVersionCode;
            keystorePath = PlayerSettings.Android.keystoreName;
            keystorePassword = PlayerSettings.Android.keystorePass;
            aliasName = PlayerSettings.Android.keyaliasName;
            aliasPassword = PlayerSettings.Android.keyaliasPass;
        }
    }

    private string buildSettingPath;

    public BuildSetting buildSetting;


    [MenuItem("Window/Build Helper")]
    static void Init()
    {
        EditorWindow.GetWindow(typeof(BuildHelper)).Show();
    }

    private void Awake()
    {
        buildSettingPath = Path.Combine(Application.dataPath, "buildData.json");

        if (buildSetting == null)
        {
            buildSetting = new BuildSetting();
        }
    }

    private void OnGUI()
    {
        if (File.Exists(buildSettingPath))
        {
            if (GUILayout.Button("Load Build Setting from JSON"))
            {
                var dataAsJson = File.ReadAllText(buildSettingPath);

                buildSetting = JsonUtility.FromJson<BuildSetting>(dataAsJson);
            }
        }


        GUILayout.Label("Current Target Build Settings");


        var serializedObject = new SerializedObject(this);
        var serializedProperty = serializedObject.FindProperty(("buildSetting"));

        EditorGUILayout.PropertyField(serializedProperty, true);
        serializedObject.ApplyModifiedProperties();

        ApplyCustomBuildSettings();

        if (GUILayout.Button("Save Build Setting to JSON"))
        {
            var jsonData = JsonUtility.ToJson(buildSetting,true);
            File.WriteAllText(buildSettingPath, jsonData);
        }
    }

    void ApplyCustomBuildSettings()
    {
        PlayerSettings.bundleVersion = buildSetting.version;
        PlayerSettings.Android.bundleVersionCode = buildSetting.versionCode;
        PlayerSettings.iOS.buildNumber = buildSetting.versionCode.ToString();


        PlayerSettings.Android.keystoreName = buildSetting.keystorePath;
        PlayerSettings.Android.keystorePass = buildSetting.keystorePassword;

        PlayerSettings.Android.keyaliasName = buildSetting.aliasName;
        PlayerSettings.Android.keyaliasPass = buildSetting.aliasPassword;
    }
}