How to make line renderer glow like any other 3d object using custom shader?

Hello, I am trying to learn making custom shaders. And here's a thing that I am stuck at: I have a line made with line renderer and a material applied to it. What I am trying to achieve is to make the sides of the line glow. Something like lightsaber effect would be optimal. I have an idea of how to make simple 3d object glow in general, but I think it's different for a line renderer. I tried adding the same lines of code from my previous shader, which worked for a 3d object, but for line renderer it has not glow at the edges. Any help will be appreciated:) Thank you in advance!

 Shader "Custom/:Laser-Glow-Shader"
 {
     Properties
     {
         _ColorTint ("Color Tint", Color) = (1, 1, 1, 1)//main color
         _MainTex ("Base (RGB)", 2D) = "white" {}//texture
         _RimColor("Rim Color", Color) = (1, 1, 1, 1)// glow color
         _RimPower("Rim Power", Range(1.0, 10.0)) = 3.0//glow strenght
     }
     SubShader
     {
         Tags { "RenderType"="Opaque" }
         Tags { "LightMode" = "Vertex" }
         CGPROGRAM
         #pragma surface surf Lambert
 
         struct Input
         {
             float4 color : Color;
             float2 uv_MainTex;//2 params to adjust
             float3 viewDir;//3 params to adjust
         };
             float4 _ColorTint;
             sampler2D _MainTex;
             float4 _RimColor;
             float _RimPower;
        
             void surf (Input IN, inout SurfaceOutput o)
             {
                 IN.color = _ColorTint;
                 o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb * IN.color;
                 half rim = 1.0 - saturate(dot(normalize(IN.viewDir), o.Normal));
                 o.Emission = _RimColor.rgb * pow(rim, _RimPower);
             }
             ENDCG
     }
     FallBack "Diffuse"
 }