[FIX] Initial members value on Create Channel Modal (#26000)

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#### before
![Screen Shot 2022-06-24 at 11 58 22](https://user-images.githubusercontent.com/27704687/175562315-221dbc9a-5695-4259-a8f7-644e2ff0ab36.png)

#### after
![Screen Shot 2022-06-24 at 11 59 38](https://user-images.githubusercontent.com/27704687/175562510-a4a6be49-bbd2-4aeb-aedb-a5a7a6f1159d.png)

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apps/meteor/client/components/UserAutoComplete/UserAutoComplete.tsx

@@ -38,9 +38,9 @@ const UserAutoComplete = ({ value, ...props }: UserAutoCompleteProps): ReactElem
 			onChange={props.onChange as any}
 			filter={filter}
 			setFilter={setFilter}
-			renderSelected={({ value, label }): ReactElement => {
+			renderSelected={({ value, label }): ReactElement | null => {
 				if (!value) {
-					undefined;
+					return null;
 				}
 
 				return (

apps/meteor/client/components/UserAutoCompleteMultiple/UserAutoCompleteMultiple.tsx

@@ -1,4 +1,4 @@
-import { AutoComplete, Box, Option, Chip } from '@rocket.chat/fuselage';
+import { AutoComplete, Box, Option, OptionAvatar, OptionContent, Chip } from '@rocket.chat/fuselage';
 import { useMutableCallback, useDebouncedValue } from '@rocket.chat/fuselage-hooks';
 import React, { ComponentProps, memo, ReactElement, useMemo, useState } from 'react';
 
@@ -52,12 +52,12 @@ const UserAutoCompleteMultiple = ({ onChange, ...props }: UserAutoCompleteMultip
 			}
 			renderItem={({ value, label, ...props }): ReactElement => (
 				<Option key={value} {...props}>
-					<Option.Avatar>
+					<OptionAvatar>
 						<UserAvatar username={value} size='x20' />
-					</Option.Avatar>
-					<Option.Content>
+					</OptionAvatar>
+					<OptionContent>
 						{label} <Option.Description>({value})</Option.Description>
-					</Option.Content>
+					</OptionContent>
 				</Option>
 			)}
 			options={options}

apps/meteor/client/sidebar/header/CreateChannelWithData.tsx

@@ -41,7 +41,7 @@ const CreateChannelWithData = ({ onClose, teamId = '', reload }: CreateChannelWi
 	}, [canCreateChannel, canCreatePrivateChannel]);
 
 	const initialValues = {
-		users: [''],
+		users: [],
 		name: '',
 		description: '',
 		type: canOnlyCreateOneType ? canOnlyCreateOneType === 'p' : true,