How to turn off lighting in shader

Hi everyone! I have a script that create light effect on the edges of the object, it works great for me but I need this material to work like unlit texture shader, so it should not recieve any light from scene. Here is the code:

 Shader "Custom/SunGlow" {
     Properties {
       _Color ("Main Color", Color) = (1,1,1,1)
       _MainTex ("Texture", 2D) = "white" {}
       _RimColor ("Rim Color", Color) = (0.26,0.19,0.16,0.0)
       _RimPower ("Rim Power", Range(0.5,8.0)) = 3.0
 
     }
     SubShader {
       Tags { "RenderType" = "Opaque" }
       Lighting Off
       CGPROGRAM
       #pragma surface surf Lambert
       struct Input {
           float2 uv_MainTex;
           float3 viewDir;
       };
       sampler2D _MainTex;
       float4 _RimColor;
       float _RimPower;
       void surf (Input IN, inout SurfaceOutput o) {
           o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb;
           half rim = 1.0 - saturate(dot (normalize(IN.viewDir), o.Normal));
           o.Emission = _RimColor.rgb * pow (rim, _RimPower);
       }
       ENDCG
     } 
     Fallback "VertexLit"
   }