different names in different dynamics

app/Models/Dynamic.php

@@ -21,7 +21,7 @@ class Dynamic extends Model
 
     public function participants(): BelongsToMany
     {
-        return $this->belongsToMany(User::class, 'participants')->withPivot('role');
+        return $this->belongsToMany(User::class, 'participants')->withPivot('role', 'display_name');
     }
 
     public function ledgers(): HasMany

app/Models/Participant.php

@@ -12,5 +12,6 @@ class Participant extends Pivot
         'user_id',
         'dynamic_id',
         'role',
+        'display_name',
     ];
 }

app/Models/User.php

@@ -49,6 +49,13 @@ class User extends Authenticatable implements PasskeyUser
         return $this->hasMany(ReadCursor::class);
     }
 
+    public function displayNameFor(Dynamic $dynamic): string
+    {
+        $participant = $dynamic->participants()->where('user_id', $this->id)->first();
+
+        return $participant?->pivot?->display_name ?? $this->name;
+    }
+
     /**
      * Get the attributes that should be cast.
      *